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Q: How do you test primary resistance on a 3.0 ohm coil?
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If you have an Ohm meter you will want to measure the resistance (ohms) of the Primary and Secondary sides of the coil pack and compare your readings to the Specifications for the vehicle.


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You test an ignition coil by checking the resistance with an ohm meter. The resistance values should be something like, Primary winding .3 to 1 ohms, Secondary winding 8,000 to 11,500 ohms.


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You can check the ignition module (coil) with a digital volt/ohm meter for a start. Check the primary and secondary circuits resistance and go from there. You can also check the spark plug wires resistance with the same meter.


How do you test ignition coil on a snowmobile?

you cant you can test it with an ohm meter if it reads 000 theres no resistance and its bad if it reads an open its bad you want around a couple hundred ohms


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How do you test the ignition coil on a 1992 BMW 525 to determine whether or not they are firing?

The Bentley manual says to pull the plug wires and hold them toward ground while someone cranks the car with the key to see if they spark. I really don't like that idea. My way of doing it is to put my timing light on the number one wire ( it has an inductive sensor ) and have someone crank the car and see if the strobe flashes or not. You can test each wire that way. You can test the spark plub wires with an ohm meter to make sure they have little to no resistance. You can test your coil with an ohm meter as well. Disconect the battery and the coil first. The primary resistance ( between the small + stud and small - stud ) should be .8 ohms. The secondary resistance ( between large center plug where coil wire is and the small - stud ) should be 5000 ( 5K ) ohms.


How do you tell the difference in the negative and positive on a coil?

Normally the terminals are marked on the coil ( if it's a bosch coil the one marked 15 is the primary winding positive terminal ). The large center one is the secondary positive ( the one that leads to your distributor ) and the two on the sides of it are the positive primary and the ground. If you don't know wich one is wich disconect the battery then disconnect the two smaller wires and remember wich one goes where. Use an ohm meter to test the resistance between a good ground on the body or engine block on each wire. The one that has no or very low resistance is the ground wire. If you are holding a coil in your hand and it isn't marked use the ohm meter to check the resistance between the secondary positive and the other two terminals. There should be infinite resistance ( open circuit ) to the positive of the secondary and 6Kohms or there abouts to the common ground terminal.


How do you test a small engine ignition coil on a 22 hp kohler while the coil is not installed?

You can't test a coil off the unit the only way to test the coil is disable the kill circuit if it fires it mean u have other problems such as a safety switch problem like seat switch or neutral safety switch. The above answer is completely false. You use an ohm meter and test to manufacturers specs for the ohm of your specific coil, typically in the 8,000 ohm range +/- 2,000 ohms. Save