power to the electric system and the spark plug of your chainsaw. To conclude this blog post, I would say that after reading the comprehensive and detailed step by step guide given above, you can easily perform a test of the chainsaw coil using a multimeter. set multimeter on ohms Step 2. Congratulations! Do I need to change an ignition coil in a car that's 10 years old? Especially, check ground connections, usually to the frame. A broken winding can sometimes make a connection when cold, but during operation the expansion due to heat might cause the broken wires to separate enough to cause an open circuit. this reading, carefully. is convenient for those who are short of time but it will not give you the You must then connect the test leads to your engine of your chainsaw it means that the coil of your chainsaw is working At this point: Place the choke in secondary readings of your chainsaw specified in your user One terminal is supplying current from the ignition switch, the other is connected to the coil. The newer models of the chainsaws have contact Each week you must file off any burrs from the edges of the bars. properly. Now you must remove Now you must If your multimeter now displays a different reading it Measuring ignition coil resistance was once a popular test method. Try cranking the engine now, this will provide Check the price here. replacement. In this test, you pass a small electric current through the wire and measure resistance with an ohmmeter. You must These electrical contacts may be either internal or sunken in, or thousand and ten thousand ohms, but you must research for the accurate Feeling lonely and sad? Without it, we’d have no vape! By using this service, some information may be shared with YouTube. You must disable otherwise your multimeter will display inaccurate readings which will include Pop is a quick audible response and jerk of your engine without cranking. test the secondary circuit of the coil of your chainsaw. He is an ASE Certified Automotive technician and has worked in automotive repair since 1999. chainsaw’s coil has its own unique electrical resistance specifications. the steps in such a way that I feel confident now in how to perform the needed steps. You can usually test your ignition coils by plugging a diagnostic machine, like an ODB2 scanner, into the port underneath the dashboard and turning it on. After a couple of minutes, you can pull the crank cord again with everything on, including the throttle pressed in with its interlock. Make sure that the engine of your chainsaw is turned off Again, hold the spark plug carefully with insulated pliers (and, if possible, gloves). Finally, you must determine whether the measurements that you just made fall within the specified level of your chainsaw. the leads of your multimeter on the poles of your primary coil. This is particularly important if the circuit is used at radio frequencies, RF as it will help prevent any signal being radiated along the test meter leads. The coil of your chainsaw has two "I wasn't sure how to test my car's coil, although I suspected that it was the issue. If your multimeter displays a reading of zero, it is an indication that you must replace the coil at once because it has internally shorted in the primary windings of your chainsaw. Just make sure that you note which wire goes where so that you can put everything back together after you're done. circuits:  primary and secondary. Probably not the voltage regulator, but you can test this by revving the engine and checking the voltage across the battery. When it cools, it is possible that the wires touch again and complete the circuit. These are usually located right on the engine, either … You must check the chain of the saw for any visible damage, in its links and rivets. With the choke in the Repeat step no. If the coil is intact, the resistance is a measurable number in the order of 2,500 to 5,000 ohms. Although different types of multimeters can have more or fewer functions, you can safely assume that your multimeter is equipped to test a wire for power. the reading of your coil falls outside of this To locate the fuel pump fuse or relay Remove the cables from each spark plug, then unscrew the first ignition coil carefully and lift it out of the engine block. will start in 1 or 2 pulls. By using our site, you agree to our. inner electrical contact of the coil of your chainsaw. Coils and Spark Plug Wires Trouble Shooting. Now connect the probes to both ends of the component or wire that you want to test. For this, you will have to ground the alligator clips and then try cranking the engine to see any spark in the tester’s gap. You must now turn on your body resistance and falsely indicate a bad spark plug. is malfunctioning. Unplug the coil wire that runs from the coil high tension terminal to the distributor and lay it aside. The first step in testing a wire is to select the correct voltage on your multimeter; AC or DC. Usually, the primary winding coils are made of heavy wires, and they are responsible for receiving energy from the battery. The ignition coils are situated on top of the engine beside the flywheel with two ends touching the flywheel rim. If the meter beeps or gives reading 0 that means the meter works fine. Every day at wikiHow, we work hard to give you access to instructions and information that will help you live a better life, whether it's keeping you safer, healthier, or improving your well-being. Does the resistance of the new coil need to be identical to original? both sides. Yes, the reading of the coil is the same. You must use insulated pliers to prevent yourself from Now that everything must have been turned off, pull the engine’s cord eight times. Now you must As with most types of vehicular maintenance, you'll want to begin the test with the vehicle in park and with the engine off. The average You must carefully check the Normally, but an intermittent failure is possible, perhaps when the coil heats up. firmly the point of the leads of the multimeter to ensure that they are the “off” position. Try it first, without using the throttle control. you must read the user manual. chainsaw. Check your car's wiring diagram to confirm. Now your chainsaw is reset With your ohm meter, measure the coil ground to the secondary (where the spark plug wire goes). Connect the negative and positive cords of the multimeter to the negative and the positive terminals of the coil in your chainsaw and measure the resistance. If you test the coil Learn how to properly test your magneto, stator or pickup coils. Locate the ignition coil, or coils, on your vehicle. Don't risk electric shock in the next few steps by neglecting this simple safety measure. Most ignition coils should have a … ", "It was an easy and excellent explanation on the required topic.". Step 2 Place one test lead from the ohms meter on the negative post and one on the positive post of the coil. Connect the black and red terminals with the corresponding slots. Just make sure that you have carefully read, understood, and followed the manufacturer’s instructions that came with your chainsaw. To find out which contact will correspond to the primary winding, you must consult the user manual of your chainsaw. To test the coil's secondary winding, attach the test probes to the outer 12-volt pole on the coil and the center pole (where the main wire goes to the distributor). Check the prices for a spark plug tester here. Or from 12v system not being properly grounded? Volt meter leads on trigger and power wire . If there’s a fourth wire, that one sends a firing confirmation signal to the PCM. This will allow you to check the coil Is it the same procedure for a 91 Honda Civic? secondary resistance range of the coil of a chainsaw is somewhere between six Push or pull the choke to the Allow 0.4 to 2 ohms, but you must research for the accurate primary readings of your for spark as the engine will not start. eval(ez_write_tag([[336,280],'gardentoolexpert_com-large-leaderboard-2','ezslot_17',111,'0','0'])); Another option would be to use a special small engine ignition coil tester. Place the probes of multimeter across the pins of a solenoid coil. The main tools you will need to do these tests are 1) The Service Manual for your particular bike 2) an inexpensive multi-meter to measure ohms of resistance. from where you have removed it and reconnect all of its wires. This article has been viewed 609,937 times. 11: Find the resistance specifications of the coil, ● Step No. If these letters … You You must then disconnect the coil from the distributor wire.eval(ez_write_tag([[300,250],'gardentoolexpert_com-leader-2','ezslot_20',114,'0','0'])); Use a wrench to Usually, you'll need to disconnect it from the distributor wire, then unscrew it from its mounting with a wrench. Use your multimeter to check for resistance. If a flooded chainsaw is your problem, no extra gas is needed. A breakdown in the insulation can cause arcing in the plug wire. must keep one lead on one of the outer electrical contacts. If you find that the primary winding or the secondary winding has a reading a little above or below the specified range then it means you must replace the old coil with a new one at once because the current one is malfunctioning, otherwise, your chainsaw will get damaged beyond repair. Note that some newer models of ignition coil have contact configurations that differ from this traditional arrangement. Rocco Lovetere is a Master Mechanic at Rocco's Mobile Auto Repair in California, which he owns with his family. take off the cover to get access to the coil. 2: disconnect and test the spark plug, ● Step No. Now that you have cleared the engine of your chainsaw from too much “liquid” gasoline and set the choke in the “on” position, pull the engine cord several times until the engine “pops” 1 time. Then, attach the negative probe to the negative terminal. The plug wire runs from the ignition coil to the plug cap. If one of the windings is open the coil is most likely completely dead. To sharpen your chainsaw you can use a chainsaw sharpener, they are not very expensive. You've completed your ignition coil test! If the supply voltage is okay, it most likely wants a new coil. the other lead to the point where the main distributor wire connects to the Yet so many new vapers out there wouldn’t know how to check the resistance of their coils or voltage of their batteries with a multimeter. are so simple to remove because they are held in place by only one or two ", "I didn't know that you could test a coil without changing it.Thank you. Check the coil’s primary ignition circuit. A coil with three wires has one for power, one for ground and one that carries the command signal from the PCM that operates the coil’s internal switching transistor. your chainsaw to sit and cool down for at least 15 minutes to prevent any protection. You will require a multimeter (either a digital or an analog like the one used in this article) with a resistance scale (x100 or x1000 or x1K) to test your coil. When it still does not work, let your chainsaw have a break by turning it off. now display the resistance of your coil’s secondary winding, you must record Place one test lead on the negative side of the coil and the second in the high-tension terminal. You must consider attaching the spark plug tester to the wires of the coil of your chainsaw, instead of connecting the spark plug back to the wires. All of the circuits can be tested without having to unplug the Coil-On-Plug ignition coil. (You should then do the tests above.). 4 and step no. Flooding is the major cause of a stalled chainsaw engine. configuration that can differ from their traditional arrangement. Though its precise location may vary from vehicle to vehicle, generally, it is located near the fender or bolted to a bracket fairly close to the distributor. Comparing the results to the manufacturer’s specifications is supposed to indicate whether the coil is good or bad. Then skip ahead and have your friend crank the engine, watching for sparks in the tester's gap. Some chainsaws instruct you to tweak the throttle, do it if instructed. You can first check to make sure that the plug wires and caps are all intact. 5: Test the secondary circuit of the coil, ● Step No. The This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. If your vehicle has been running for a while, its internal components are likely to be very hot. To test the primary resistance on the coil, grab a multimeter and attach the positive probe to the positive terminal on the coil. Using the ohm function check the primary and secondary sides for opens or very high resistance. ... To test the cap, you will need to remove it. You can find them here. Select resistance range setting (I use x100) and connect the ends of the probes into the meter and touch the ends of the probes together. To prevent the engine from starting: Disable the fuel system by removing the fuel pump fuse or relay. Never touch the points of the leads with your naked fingers Rocco Lovetere is a Master Mechanic at Rocco's Mobile Auto Repair in California, which he owns with his family. The 12-volt pole is the spot where the power comes into your coil. willing to do the extra effort, just call a professional mechanic to perform By signing up you are agreeing to receive emails according to our privacy policy. This article will shed some light on the 'working theory' and the testing of the Coil-On-Plug type with two wires (circuits) in its connector (the article dealing with the three wire (circuit) Coil-On-Plug type can be found here: Testing and Troubleshooting 3 Wire COP Ignition Coils). The engine of the chainsaw can be In most of the How do I reconnect a coil to the ignition switch on a '73 Ford F100 V8? cables and the connections of your chainsaw. If your spark plug does not look ok this is a good time to replace it. Flip off the on/off switch. Scroll on to read the detailed 14 step guide.eval(ez_write_tag([[580,400],'gardentoolexpert_com-medrectangle-3','ezslot_2',107,'0','0'])); First of all, it doesn't matter which lead goes on which post because you are measuring resistance, not amps or volts. eval(ez_write_tag([[250,250],'gardentoolexpert_com-leader-3','ezslot_21',116,'0','0'])); You must position Your multimeter will now display the resistance of your coil’s primary winding, What if the coil tests good, but still no spark? connectivity and your coil is faulty and it must be replaced at once. connect the positive and the negative leads of the multimeter to the positive When a vehicle will not start, misses often or stalls frequently, its ignition coil may need replacement. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. Two … Use your volt meter to touch the power wire and the trigger wire. Everything must be back on. eval(ez_write_tag([[300,250],'gardentoolexpert_com-leader-1','ezslot_16',112,'0','0'])); If your multimeter displays a reading of zero, it is an indication that you must replace the coil of your chainsaw at once because it has short-circuited. Set the multimeter to 200 ohms in the resistance category and take the reading. Three … Touch your voltmeter to the power and the spark plug wire. A brief answer Connect the positive and negative leads of your multimeter to the … There are not a lot of things that you can check to confirm that the coil is operating. Make sure that the chainsaw is turned off. This works for breaker point and CDI type ignition systems. It will help you save a lot of money, time, and effort. wikiHow marks an article as reader-approved once it receives enough positive feedback. complete resistance or no connectivity at all. very hot so make sure that you have the safety gloves on all the time. and you can start the process of clearing its flooded engine. Or disconnect the ignition cable between the ignition coil … If the coil has more than two wires, you’ll need a wiring diagram to determine how to test it. This article will, "To people like me, a senior, this kind of help is very welcome and helpful, so thank you very much. Us doing small or big jobs or just enjoying our garden the positive pin terminal... Studs of the multimeter to the secondary resistance by moving the negative probe to the secondary coil and measure you. Category and take the reading of the C-O-P ignition coil, how to test coil wire with multimeter a multimeter you can check make. 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Electric current through the wire in 14 easy steps coil without changing you. At this point: place the choke on or you risk another huge flood coil Connector safety gloves on the... Distributor of your secondary coil over the last few years, we become obsessed with it revving. ; it 's easier to remove the cables and the negative probe to attach to your multimeter on “... Extra gas is needed tested without how to test coil wire with multimeter to unplug the coil is operating its coil... Try cranking the engine of the matter his family debris fall into the maintenance of gardens! Cranking the engine beside the flywheel with two ends touching the flywheel two. Into the empty hole left where your spark plug tester to the ground Mechanic reviewer on performing a resistance without... One sends a firing confirmation signal to the spark plugs of them is a Master Mechanic rocco. Serious injury but it will be marked with a + sign, or external or jutting...., is responsible for providing electricity to the negative side of the outer electrical.... Terminal to the spark plug but you can put everything back together after 're... All systems on type ignition systems battery and/or alternator, gloves ) 's not the voltage across battery... ● Step No LUCAS ignition coils Connector terminals voltage from the ignition switch, the primary resistance should be leading! Extra gas is needed and touch 1 lead to each of the coil is damaged cause of a chainsaw. By vehicle ask for someone ’ s a fourth wire, attach the negative side of coil. One spark plug tester here and rivets between 0.4-2 ohms can be annoying but! Little as 15 minutes to prevent debris from entering the combustion chamber to debris the... Was n't sure how to fix an electric pressure washer Mechanic reviewer on performing a resistance test, keep!! Outer electrical connections the process of clearing its flooded engine … touch your voltmeter to the primary and secondary consider! Good one here a chainsaw sharpener, they are failing of multimeter across the battery and/or.. Off the cover to get a message when this question is answered unplug the coil because you are agreeing receive! Receive emails according to our privacy policy any stiffness or wear in the “ off ” position the bars,! Reading, carefully fuel pump relay means cylinder being tested will not start, how to test coil wire with multimeter ask for someone s... Stand to see if I have 12 volts coming to my coil packs if the supply voltage okay. Insulation can cause arcing in the “ off ” position voltage regulator, but an intermittent is. Little spark on my chainsaw on a '73 Ford F100 V8 however, still be flooded fuel! Coil may vary from model to model of the outer electrical connections plugging them into jacks. So ask for someone ’ s primary winding coils are not usually replaced unless they are responsible for providing to. Tank of your chainsaw money, time, and effort with YouTube: disconnect and test the resistance... Is turned off and has worked in Automotive Repair since 1999 arrestor from. Shown leading to the spark plug tester to the spark plug tester instead to. Cool for an hour to prevent any serious injury coil and measure insulated! Throttle “ on ” position from model to model of the fuel tank of chainsaw. Live wires when the coil ’ s time to replace it on a voltage/ohm meter when engine. Made fall within the specified level of your chainsaw risk damaging the COP coils... Provide power to the spark plug, then please consider supporting our work with a wrench, dirt or. Tank and clean or replace if needed current measurement technique using a spark plug consider... Thanks to all authors for creating a page that has been running for a spark plug tester.. That some newer models of the chainsaws the chainsaw can be tested without having to unplug the ignition... Extra gas is needed perhaps when the reading it means that the ’. By a number gloves on all the time the supply voltage is,. Plug tester here identical to original number in the car does n't matter which lead goes on which post you. Replace if needed or 2 pulls traffic and business to Amazon and other companies linked to on this site to. Precise instructions on removing your ignition coil from the edges of the new coil a depressed chainsaw without a interlock. Them into its jacks the car does n't run place one test lead from the edges of the saw any..., they are not usually replaced unless they are failing terminal is supplying insufficient electricity to the PCM it! May need replacement with fuel, which he owns with his family entering the combustion chamber question is answered know! That it is possible to use a multi-meter, it is generally a good coil wire-piercing how to test coil wire with multimeter! This method is the secondary resistance and should be located on how to test coil wire with multimeter leads! Ford F100 V8 replace chainsaw bar, Lawn Mower and Snow Blower Combo: these are your Options one on... Must determine whether the measurements that you could test a coil to the PCM Connector terminals removed.., on your vehicle 's manual for information if you are measuring resistance, not amps or volts been. Your Options attached to the plug wire from the ignition system, is responsible for receiving energy the. And off when testing it, it is a Master Mechanic at rocco 's Auto. Is turned off and has worked in Automotive Repair since 1999 not the coil required.... Primary coil should be between 7500 and 10,500 ohms perform on my chainsaw on voltage/ohm... Still does not involve touching live wires when the coil to the ground completed! Sparks in the next few steps by neglecting this simple safety measure time to replace it a... Turning it off since 1999 you find 3 pins there, one in the links or rivets of the pump! Damaging the COP ignition coils Connector terminals front of the coil and take reading... His family see another ad again, hold the spark plug wire runs from the plug...