How To Test Ignition Switch With Test Light

How To: Use a lab scope and inductive pickup to test a coil on a car spark plug How To: Remove the ignition coil & module in a Saturn S-Series How To: Test a possible bad coil on your car for cheap How To: Find electrical shorts in a car with a test light and fix a broken 12v plug. Verify that the starter signal from the ignition switch is getting to the solenoid by attaching the alligator clip on the test light to a good ground. The check engine light comes on when your car’s computer detects an issue within the powertrain. If the lamp stays on, replace the switch. You can check the voltage of the switch by using two tools - a 12-volt test light or a digital multimeter. To replace a car’s ignition switch, one must remove the steering column, disconnect the wiring, test the switch, and install the new switch, according to DoItYourself. You may suspect a bad starter solenoid if. If you suspect that your light switch may be faulty, you can do a simple test to find out. Am I correct in thinking the switch for the R80RT would be the same as the R100RT? In searching for a switch I seem to find more availability for the R100, which makes sense. Checked voltage reading and ran the computer on it and no codes. The problem is that the light in the tester acts as a bridge for the circuit, when the switch is off. Finally, I show how to perform a resistance test on the coil itself, using an ohmmeter. Voltage should cycle between 0. If the engine does not crank but all the electrical accessories work, then the ignition switch should be promptly tested. Greg's 2004 Porsche 996 Replace Ignition Switch Nothing worse than being out shopping with your kids in your hot expensive sports car and when you get back in the car and put in and turn the key you hear a crunch and the key gets stuck. Testing the switch is simple. Allow it to snap back to the ‘run’ position and note warning lights. This test can be misleading. I measured the voltage between each terminal and ground - Zero voltage. One drawback to using a test light, especially one that uses an LED, is that you can't really tell what voltage you have. Remove the top cover on the saw to expose the spark plug. • Make sure that glove box compartment lamp is off when the glove box door is closed. I just had my brake warning light start flashing last night while driving through a rain storm with some warning beeps. First, turn the ignition key to the "on" position. As always, test the alternator rotor to be sure it hasn't failed. The ignition switch is the master switch that provides power for the vehicle's electrical accessories, computer, fuel and ignition systems. Symptoms of a bad ignition coil include engine shaking, sputtering and lack of power (misfiring). So if your radio, trip computer, wipers, and turn signals don't work and the fuel pump is dead, you're likely to have a bad ignition switch. Using a test light, ground one end of the test light to the engine block (must be bare unpainted metal), and put the probe of the test light into the plug you took off of the starter. All you need is a simple multi-meter and a 12-volt test light. How to Test a Light Switch. The purpose of an ignition switch is to prevent the electrical system from draining the battery when the tractor is not running. How to Test an Ignition Coil. For this, what you need is high-impedance test light, an ohmmeter, and two jumper wires. Ignition unhooked, kill switch unhooked, getting nice bright light with the test light on the coil, getting a nice bright flashing light with the test light on the points, but NO spark, until I didn't even realize I was putting the points cover back on each time I was testing the spark plug. You will need to remove the ignition module from your Mercedes-Benz and ship it one of these companies that can test and repair the EIS-EZS. How to Bypass/Test your Neutral Safety Switch Lately it seems members are haveing a spat of no Cranking problems with their starters. Turn the key to ignition on/run (no need to try to start it). Furnace Flame Sensors We have seen many furnace flame sensor problems in our 25 year old HVAC business. I measured the voltage between each terminal and ground - Zero voltage. From simple stop-steer-go check up to fully refitted carts. The White wire is a 12 volt constant. Run a test light from the battery and tap it into each hole in the rubber plug you pulled from the ign switch until you get the wipers to work. No light means you're not getting power to the coil. Disconnect the S terminal of the starter solenoid to prevent the engine from cranking when the ignition is in the run position. Checked voltage reading and ran the computer on it and no codes. A few days ago my friend told me to check my grounds and when I was checking I found that my positive battery wire was horribly corroded. If you have a weak spark coming from the spark plug, lets check the ignition input voltage first. 2006 Chrysler Pt Cruiser Ignition Switch I Removed The Starter Relay. The blue wire @ your left side switch should not be powered when ignition switch is off. If the vehicle will not move, please check to ensure the following:. If the car battery and the alternator are ruled out for any problems, the culprit is mostly the switch, which may have to be replaced. The easiest way I have found to check a switch is to remove it from the tractor. An engine that refuses to start can be another sign of a bad ignition switch. Check Engine Light or Service Engine Soon Light should be reset and turned OFF. Doing so will stop the engine from cranking despite turning the ignition key to the run position. magneto ignition system. You can test the ignition switch with an ohmmter, which is the most direct way. Helpful Information. Testing a Light Switch Electrical Question: How can I use a voltage tester to check a light switch? I have an older home. How to Test an Ignition Coil. Battery light on and no crank ignition switch to fuse box test. They work with anything that's on a coil on plug vehicle, they come with a single and a triple and you can string them all. This tutorial will help you test the ignition switch on the 1997 Chevrolet and GMC Pick Up, Suburban, Tahoe, and Yukon equipped with a 4. [Query:] After stopping our '90 745T the ABS light came on, the blinkers did not work, along with the power windows. Turn the key on. A motorcycle ignition consists of components that produce spark for the engine's spark plugs. Check the terminal resistance with the car running. It was burnt up so that it wouldn't go to auxiliary. GM ignition switch 10 minute relearn procedure I see this a lot working on cars GM vehicles equipped with Passlock. Tools • Wire jumpers • Multimeter Testing Procedure 1. ELECTRICAL. First Things to Check 3. So, I decided to put the ignition switch onto auxiliary, and test it. DOOR TRIGGER (-) BLACK/WHITE At Dome Light On/Off Switch DOME LIGHT SUPERVISION (-) LT. If the other burners are sparking properly, the spark ignition switch is likely defective. The tester light should not come on. Simple replacement. Brake light switch has several contacts as shown in the picture below. Best c test harness - Wiring harness for led light bar, 13 ft Waterproof Wiring Harness Kit On-off Switch Harness 14AWG Heavy Duty 40A Power Relay Harness Blade Fuse-2lead review. If there is oil pressure present, the switch terminal should read infinity, which indicates an open circuit. Place one connector of a test lamp on the output of the solenoid and the other on the battery's ground (earth) terminal. Test for voltage drop across the switch and from the radiator to the body ground, as described on page 8. The distributor can have hair line cracks in it. ignition switch terminals on the back of the switch which fits into the steering column assembly ; it is a single terminal at postion 1 ; it is a single terminal at postion 2 ; it is a double terminal at postion 3 ; it is a single terminal at postion 5 ; there is no terminal at position 4 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx. Remove or pull the spark plug wire from it (if you car uses CNP coils). Pull the wiring connector off the back of the ignition switch Unscrew the ignition switch from bracket (early/STD 1200s) or rear of the key lock cylinder (Steering Lock 1200s) Check ohms between S and B terminals. Current flows from the positive terminal of the battery to the ignition switch and an ignition coil. (Carry out this test on the now wet wind-screen. With the meter, you can check continuity of the switch. Can I check to see if I'm getting power to my coil with a test light, and if I'm not how do I check the ignition switch - Answered by a verified VW Mechanic We use cookies to give you the best possible experience on our website. Your vehicle may begin developing ignition switch problems as it gets older. Key in Ignition Switch Test. The airbag light will light up, along with the odometer, trip meter, and temperature. 04in) between the brass and the nearest engine part. An ignition coil is a kind of high-voltage transformer. There is a low pressure shutdown module located inside the engine shroud near the indicator light which senses when the pressure switch closes, grounds out the ignition coil, and powers the lamp while the engines coasts to a stop. The second ignition 1 voltage circuit is supplied by the run/crank relay through a fuse, and is used to power the remaining internal ECM circuits. Re: Need to test ignition switch for continuity - Help! For switches and contacts, use the R x 1 setting. In this case, if you don't know how to reset check engine light, here are 4 useful way for you. I just had my brake warning light start flashing last night while driving through a rain storm with some warning beeps. I have provided you with an image below of the wiring diagram of the tractor. There is also a third option, and it may be the cheapest way to fix Mercedes ignition switch module. Defective air flow switch--replace. Depress and hold the switch/pushbutton on the test. The connector may have a removable cover. Wife managed to get home and call me at work. Intermittent Bad Ignition Switch Causes Low Power and No Blower Motor. Re: Need to test ignition switch for continuity - Help! For switches and contacts, use the R x 1 setting. If the car battery and the alternator are ruled out for any problems, the culprit is mostly the switch, which may have to be replaced. For any cylinder/plug wire/coil that does not generate a solid spark, use a multimeter or test light to check for the presence of power to the coil when cranking the engine. The airbag light will light up, along with the odometer, trip meter, and temperature. The ignition switch activates the main electrical systems in your car. Do the same with the key in the ON position. Locate Ignition Tester on sale below with the biggest option of Ignition Tester anywhere online. Before condemning a coil, you should refer to the electrical manual for your year, make, and model motorcycle. Then start the engine and watch the tester window. Then flip the switch to the on position and touch both terminals with a probe from the tester. Turn the key on. SEE My Other Listings for more Alfa Romeo Parts. Ignition coil problems. To run a test on an ignition coil, first turn off your car's engine and open up the hood. Now, turn the vehicle to position two. A federal judge in Manhattan on Tuesday said he does not intend to alter, for now, a plan to try five more early test cases this year in federal litigation against GM over a faulty ignition switch. An easy way to test fuses is with a volt-meter. Most later models use Briggs and Stratton's magnetron coils—essentially a self-contained ignition system that derives its power from the magnets on the flywheel. A gas stove that uses an electronic ignition system does not have a pilot light, but rather an ignition switch attached to the control knob. It does not program the key to start the car. Testing the ground circuit is as easy as testing for the juice (in TEST 1). The wiring connecting the systems together must remain intact. Ignition coil problems. This is where I am. 6: If there's no power at the positive terminal with the ignition switch in "start" mode, check for power at the "I" terminal on the starter solenoid. Ergo it's imperative that you deal with problems associated with the switch, as soon as possible. Turn the key on. Now draw 40 amps. • Turn the ignition on (engine off) and, using either a voltmeter or a test light, test for battery voltage available at the positive terminal of the ignition coil. Your vehicle may begin developing ignition switch problems as it gets older. It is part of safety measures among sailors. Also please check out the statistics and reliability analysis of Dodge Durango based on all problems reported for the Durango. As someone turns the key, poke the solenoid terminal on the starter or the “S" terminal of fender-mounted solenoids. Verify the engine rotation (The engine needs to be turning in a clockwise direction). Check for proper igniter position; make sure there is proper ignition control grounding. IGNITION COIL INSPECTION Remove the seat and met-in box. Remember this number. Check the main burner ground by checking continuity between ground and burner. Turn the ignition switch to the ON position. As soon as it tries to start, let go of the key. The trouble is most likely with the ignition switch but the info I am looking at shows there is a wire connection between the switch and the pink wire and there is no color assigned to that wire. Let us know your needs and we can supply you with a great cart for the transportation of people or for multipurpose use. Test the switch with a continuity tester. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there?. The only way to clear it is with a scan tool. This testing procedure is valid for just about any automotive coil. Test the switch by touching one lead to that wire and the other lead to the a metal part of the engine. Connect the alligator clip of your test light to ground. Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1997-2000 Chevrolet Lumina Sedan. Check for engine air leaks and exhaust leaks before the oxygen sensors. usually the rectifier or the starter feel the battery see if it is getting warm with the ignition on this will also indicate a short. The Chevrolet truck ignition switch problem is commonly found on two separate generations of Chevy pickup trucks and sport utility vehicles. This ignition switch came with a new key as well. The ignition switch not only switches on the main electrical systems of the vehicle, but also provides power to accessories like the radio. When the ignition switch stalls while the engine is running it might stop power to the ignition and fuel systems, which will make the engine to halt. this test is successful. If you see sparks or the engine starts running rough it is the cap. Checking voltage ahead of and after the switch may not reveal a problem. All you need is a simple multi-meter and a 12-volt test light. To check a starter solenoid, you can use a digital multimeter and a few common tools. Used carts Looking for a complete cart? No worries, we got your back. 4 - If a spark did occur, check the PIP and ignition ground wires for continuity. After allowing time for the regulator’s start-up delay, place the head of a steel screwdriver near the nut on the pulley shaft or near the rear bearing of the. If you had a shop repair manual it may tell you how to bypass the switch so you could test it. The 1990 switch has 6 wires with 2 red ones. These steps will not allow you to test the newer CFL light bulbs or the latest LED light bulbs. If your switch is a more complicated setup, consisting of more than two wires, use the owner's manual to locate the primary "power in" and "power out" wires and test those. You are done when the security light turns off after a 10-20 second delay. One is using a basic test light and two is using a scope and low amp probe. This tutorial will help you test the Ignitor (ignition control module) on the 1995 thru' 1996 1. The switch for the check engine light on your 2002 Isuzu Rodeo can be reset by resetting the electronic control unit. Scooter unable to start via ignition switch?!? and ask them to load test it. If the Clutch Safety Switch is bad or if the rubber piece on the clutch pedal is missing/damaged/not pressing the switch in, then the starter relay is activated blocking the signal from the ignition to the starter. How to Test an Ignition Coil with a Multimeter You can also check the primary coil with a digital storage oscilloscope and a low amp inductance probe by observing the primary coil waveform. This task requires a replacement ignition switch, a test light, a screwdriver, a ratchet, wires and wrenches. If there are problems with weak spark or and engine that runs good for a while then starts a random missfire, the ignition switch may be the problem. "I" is what fully energizes the ignition coil. With the test light grounded, move the test light to the negative terminal of the coil. Turn on the multimeter and set the dial to "V" for volts. Note: Terminal 15 is positive, terminal 1 is negative. A breakdown in the insulation can cause arcing in the plug wire. Test the circuit breaker with a voltage tester to see if it's faulty. Product description The ELTS manual key switch provides a simple low cost method of testing groups of Emergency Luminaires by interrupting the permanent mains supply by the insertion and activation of a 'fish' key. Best Answer: does the machine have a battery if so put an test light looped from the ground/neg side to the positive side and crank the engine, if the light pulses on and off that tells you three things, the ignition control module is working the trigger is sending a signal to the module and the coil has power. If using a charger set to 2 or 10 amps not start!! Connect a power source to the red wire. Disconnect the 5P connector (A) from the ignition switch (B). Once it snaps back to run position, check if the warning lights go out as the switch snaps back. If not, there is a problem with the ignition switch, wiring, bulb, or socket. If so, time to replace the plug. Ignition switch problems usually present themselves as the inability to start your vehicle. Attach the clip to a ground and touch the probe to a known hot source or the hot battery post - light should light. You can also check for resistance by placing the red probe of your multimeter to the ignition circuit terminal and the other to the ground terminal. I have provided you with an image below of the wiring diagram of the tractor. If the test light comes on during these tests then the switch is OK. Turn OFF the ignition switch. Follow these steps to safely test an electrical switch and pay attention to the electrical current flowing through the. Connect an LED test light between terminal 7 and earth. An ignition switch will nearly always test ok with a test light or ohmmeter. 1 Symptoms 4. Reconnect the battery 12v negative cable (black wire) to battery terminal (-). The ignition switch sends power to the the starter motor, engine controls, and ignition controls. Put your wiper switch in the on position, maybe spay some water on the windshield if you like. The only real test you can do on the starter motor is to bypass all of the ignition switch wiring and test it directly by shorting out the little terminal on the starter to the big terminal (which in fact is what the ignition switch does). Wait another 5 seconds! Turn off ignition. Check all fuses. Pull the wiring connector off the back of the ignition switch Unscrew the ignition switch from bracket (early/STD 1200s) or rear of the key lock cylinder (Steering Lock 1200s) Check ohms between S and B terminals. Are you using an original ignition switch? Is it from an older car?. Stop engine and remove timing light. Clean or replace. This 2004 Chevy Trailblazer came in with multiple concerns. ignition switch terminals on the back of the switch which fits into the steering column assembly ; it is a single terminal at postion 1 ; it is a single terminal at postion 2 ; it is a double terminal at postion 3 ; it is a single terminal at postion 5 ; there is no terminal at position 4 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx. Tools you will need are an adjustable wrench, 7 mm and 8 mm sockets with ratchet and extension and a T-30 Torx driver as well. It was burnt up so that it wouldn't go to auxiliary. TEST 5: Testing The Ignition Coil For 12 Volts So far all of your tests (if you have started from TEST 1) indicate that you have No Spark anywhere you've tested. The first thing to do is check the bulb. Rev Limiter + Tachometer. (check as in Figure 1). Cruise will pull in cable until change in RPM is detected. Diagnose Ignition Switch Problems. You can use a 12 volt test light on the primary side. If the lamp lights on both terminals, the fault is in the wiring between the switch and reversing lights. [Query:] After stopping our '90 745T the ABS light came on, the blinkers did not work, along with the power windows. If okay, the problem is not in the ignition system. 3 Battery 3. With the switch loosened, place the shift lever into park (P). Verify the engine rotation (The engine needs to be turning in a clockwise direction). Remove the key. I would like to know how to test/bypass my ignition switch to see if its any good anymore. You can use a test light here: After removing the bulb, clip the test light to the socket wall (ground) and touch each socket contact inside with the tip of the test light. Disconnect the connections at the ballast resistor. The ignition switch activates the main electrical systems in your car. Connect the alligator clip of your test light to ground. An engine not starting could be one of them. Turn the ignition on. ie brake applied, trans in neutral etc…. An ignition switch will nearly always test ok with a test light or ohmmeter. First Things to Check 3. Remove the test wire and try starting the car. You should monitor the IGN 0 fuse circuit with a test light while driving and see if it looses power. This is done by the vehicle's starter. If your test light does not flicker on and off, visually inspect the wires running into and out of the ignition module. is shifting ok the problem is not happening at the moment, allthough the light will still be on until the ECM is cleared. Key in Ignition Switch Test. It was burnt up so that it wouldn't go to auxiliary. Your vehicle may begin developing ignition switch problems as it gets older. Allow it to snap back to the ‘run’ position and note warning lights. When you replace the ignition switch, you will need to have your ignition key reprogrammed. Ignition Coil Resistance Check. Attach spark plug wire to tester end. If in neutral the engine starts the neutral safety switch is probably bad. Connect the test lamp to earth and probe one terminal, then the other. Turn the ignition switch on. If there is oil pressure present, the switch terminal should read infinity, which indicates an open circuit. Set the switch to the off position and touch both terminals on the side that held the wires. BATTERY IS OK, BUT STILL NO SPARK - CHECK FOR POWER TO THE IGNITION MODULE Using a test bulb or voltmeter/multimeter, check for a good power feed into the ignition module. Disconnecting the switch bypasses this circuit so the relay isn't activated. Do the same with the key in the ON position. TRY TO CHECK YOUR IGNITION SWITCH ON THE ACC MODE CHECK IF. The Hot-Spark module's red wire connects to positive ( + or 15 on Bosch coil). How to Test for Continuity (Use the resistance/Ohm section of meter) Select resistance on meter, connect one meter wire to solenoid small wire, glow plugs, or gauges and touch the other meter wire to each wire at ignition switch to determine correct wire for Ignition Switch wiring. Re: Need to test ignition switch for continuity - Help! For switches and contacts, use the R x 1 setting. Remove the switch cover plate by unscrewing its two small screws to test whether it is safe to proceed to replace or rewire a wall switch. They have two leads and a light the lights up when current is sensed. How to Test the Ignition Module for John Deere Lawn Tractors How the Ignition Module Works On John Deere lawn tractors, the ignition module is the part that is responsible for creating the electricity used by the engine cylinder to ignite fuel and oxygen, which in turn powers the engine piston. The ignition switch in a 1996-2000 Honda Civic can often fail or encounter issues. You will need to use a test light or multimeter to diagnose. Order Ignition Switch Connector for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. You can try a test to check the integrity of the ignition switch by turning the ignition key to the 'start' position. Today we are going to share with you the step-by-step instructions on how to replace your Spark Ignition Switch. If the light does not light when cranking then you have problem upstream” from the starter. The Long Road To GM's Ignition Switch Recall Records show that GM knew about faulty ignition switches in its cars at least a decade ago. This is why the bench test is a more thorough way of testing your ignition coil. Page 1 of 3 : How to Test the GM Ignition Control Module (1995-2005). An ignition switch turns the system on and off. There is also a third option, and it may be the cheapest way to fix Mercedes ignition switch module. Take off the off side rear light cover inside the landy, (above the wheel arch next to the back door lower hinge) and find the same wire and test again for 12v. For two-cylinder engines, you should test each cylinder to make sure you do not have a bad connection in the HV wires. When retrieving Ford check engine light codes with an OBD II scan tool, proceed as follows: 1. The steps shown below explain how to test the ignition switch in a 1997 Chevy Truck, the lower dash cover off the ignition switch, turn the ignition. New Emergency Light Test Switch from ESP 02-09-2019. If the light does not light when cranking then you have problem upstream” from the starter. Using an ohmmeter, check the resistance between the side terminals of the coil. Conventional coils read about 1. How To Test Ignition Switch With A Test Light. I’m anonymous because this question doesn’t make 100% sense to me and it kinda sounds like we might be on a quick path to you catching your car on fire anytime you play with electricity, even as a professional!. I bought my first TDI a 2001 Golf GLS a few weeks ago. Remember this number. You'll find relays with three, five or even six terminals, though. Do not substitute a regular 12 volt lamp (Test Light) where ever a FAST TEST article calls for this LED test tool! Radio Shack of course no longer sells these LED lights, but Fry's Electronics does! You can buy an LED with built-in resistor on their online store. Faulty Ignition Switch - posted in Problems, Questions and Technical: Hi, My mini has been off the road for too long now. Reconnect wires, grounding test pin again. my ignition switch doesnt work all the way it turns everything on except the starter it will hold the starter as in keep it going after i start it from the fuse panel but it doesnt engage it so i was thinking instead of trying to buy a new switch i was going to splice into the 2 wires the engage the starter and put i a button instead of the switch ill still use the switch to turn everything on. Check the system by turning the fan on with the engine running. You don't need any fancy tools to test a Jeep ignition coil. Make sure the battery is adequately. 2 How it works 4. Insert the leads into the meter Touch the probe tips together to verify that ohm meter is functioning. A standard analog voltmeter or a standard incandescent 12-volt test light will cause damage to the unit. How to Disable the Ignition Retard Mechanism on the SV. Make sure both the lock cylinder and column lock are in the ACC position. If test light or voltmeter does not indicate voltage, check main fusible links and large ampere main fuses in engine compartment relay box. Its easy enough to switch from ACC position to off a few times to see a spike on the amp meter, too. Stop engine and remove timing light. You must have the key programmed at a dealer or locksmith. Details about 2001 98-03 Honda VT750 Shadow Deluxe Lockset Ignition Switch Key Lock Gas Cap Be the first to write a review. Here is what you should get: Key off Brown, Pink and Purple dead. Bring the part to any Advance Auto Parts store along with your receipt or packing slip Mail the part back to Advance Auto Parts following the directions including on your packing slip Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. Unlike a voltage or current test, a continuity test is done with the power off -- the tester supplies the current you need to conduct the test. TEST 2: Testing The Ground Circuit. The connector may have a removable cover. IGNITION COIL INSPECTION Remove the seat and met-in box. 1 Engine Ignition Spark Tester. Basic Operating Theory. Price: $20. Steps to Replace the Ignition Switch. Re: Test golf cart by bypassing key switch Yes - the aftermarket key switch had a blue and a green wire connected to the switch, as well as two 12v + wires from the battery. If you crank or start the engine, you will have to start this test over. The switch we're using belongs to our ongoing Jeep restoration series, Project CJ3A. I've got a test light, make a good ground with the vehicle. How to Test an Ignition Coil. The authors have been discussing this subject for some time, each approaching the project with differing objectives. ) * Check Fanfare/horn * Check and correct clock, mypage. The igniter on a gas grill is an assembly consisting of several parts that can fail and can be replaced. It is part of safety measures among sailors. Order Ignition Switch Connector for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. " That phrase in the owners manual is the key to knowing that your system is one that can be modified in this manner. Here's the link: Linrose 10mm Jumbo Panel Mount LED - Green B4383H5. Test: Label and remove the wires from the switch. Check the ignition coil primary coil resistance by connecting an ohmmeter between the positive (Black wire) and negative (Green wire) terminals on the coil. The tools you'll need are a test light, a multimeter (optional) and a helper (to help you crank the engine). The process is exactly the same for any 95-97 and very similar 98 and up trucks. Learn about this problem, why it occurs, and how to fix it. But what does a neutral safety switch actually do, and how to test it in case of a malfunction? Hold on, as WheelZine answers such questions, by describing the function of a neutral safety switch, along with the symptoms, testing, and replacement of one. Late model Softails use a complex network of computers to monitor the engine, transmission, and braking system. If the battery is fully charged and the starter and solenoid are ok, then you will have to replace the ignition switch. How does an ignition interlock work? The driver must exhale into the device before the vehicle is started. On a non fused system the green wire powers the idiot lights, the ignition, the brake light switches, the turn signal relay and the horn. These systems may not receive the power they need to start up if the ignition switch isn't working properly. I would like to find out how to check my switch for problems. Light flashes 1 or more times depending on the number of faults. It also acts as a power switch for many of the electronic components in the car, including the radio, as well. I use a multimeter, a 12-volt test light, and jumper cables. Rotate the engine until the points are open. You can try a test to check the integrity of the ignition switch by turning the ignition key to the 'start' position. The dome, underhood and hazard lamps operate without the ignition switch on, so check these areas first. If the warning light is not working and the bulb hasn't blown you can check the wiring circuit with a test lamp. Constant Pilot with Flame Switch (rare) This older type of electronic ignition system was popular in the mid 70's and is for the most part no longer used but ranges/ovens employing it may still be in service. " That phrase in the owners manual is the key to knowing that your system is one that can be modified in this manner. At that setting, it won't matter if you touch both leads with your fingers. I am looking for a wiring diagram or picture of the wires on the key switch on my 70. Caution: Wear eye protection. Low oil indicator light used with some pressure switch systems. Disconnect the 5P connector (A) from the ignition switch (B).