Aerospace Cycling

All answers for Motorcycle



How To Test Harley Coil

How do you test a Harley coil with a multimeter?

How do you check if a coil is bad?

Here’s How To Diagnose and Test An Ignition Coil Plug the tester into the coil. Attach the ground wire. Plug in the coil connector. Adjust the spark gap to the correct measurement. Start the engine. If there’s spark, great, it works! If there’s no spark, it’s a bad coil.

How do you Ohm a Harley coil?

How do you test a Harley Davidson single fire coil?

Set the ohmmeter to read resistance on the “Rx1000” setting. Measure the resistance across the two larger terminals on the coil. The ohmmeter should read between 10,000 and 12,500 ohms. If the meter reads outside of the ranges for either of the above measurements, then the coil is faulty and should be replaced.

How do you test a Harley electronic ignition?

How do you test a Harley ignition module? Turn off the motorcycle. Allow the engine to become cool to the touch before proceeding. Disconnect, by hand, the two spark plug wires from the coil. Set the ohmmeter to read resistance on the “Rx1” setting. Set the ohmmeter to read resistance on the “Rx1000” setting.

How do you test a coil with a screwdriver?

Use a screwdriver to test the insulation of the wires. Tie the other end of the wire to the ground source Then drag the screwdriver tip down the length of each spark plug wire, around the coil, and the boots. If you see an arc from a wire to the screwdriver, you have defective wire.

Can you test a coil pack with a multimeter?

You can also use a multimeter to test resistance. Individual coils for each cylinder that attach with a spark plug wire, similar to the LS motors used on Chevy and GMC trucks, can also follow this method. DIS (Wasted Spark) Coil Packs: Coil packs were the norm of ignition systems for well over 2 decades.

How many ohms should a Harley coil have?

The primary resistance should be about 3 ohms. To test the secondary windings in the coil, put one lead from the ohm-meter to each end of the spark plug wire connections. The secondary winding resistance should be about 13,000 ohms.

What side of a coil is positive?

When you hold the coil so the plug wires are to the left (like standard shovel or evo mounting, mounting holes at the rear), the negative side is on the top and the positive is on the bottom.

How do I know if my Harley ignition module is bad?

Usually when the module goes bad the bike either won’t start, or starts fine when cold and starts cutting out or dies when it warms up, and won’t restart until cold.

How do you test a dual fire coil?

Use a voltmeter and check for battery voltage on each of the red/white wires with the key and kill switch are turned on. The dual output coil has to have both spark plug wires connected to a spark plug at all times. To test for spark, connect one of the spark plug wires to a spark plug that is grounded to the engine.

How many ohms Should a coil read?

Most coils should read between 0.4 and 2 ohms. Zero resistance would indicate a shorted coil while a high resistance reading would indicate an open coil.

How many ohms should a 12 volt coil have?

The normal, acceptable range for a standard 12-volt car is 1.5 to 1.7 Ohms.

How many ohms is a 6v coil?

6 volt coils (and 12v coils that use a resistor) usually have a primary resistance of around 1.2-1.5 ohms.

Can you check spark with a multimeter?

You can check for spark using a multimeter, test light, screwdriver, or even remove the spark plug and ground it on the engine block or frame.

What would cause a coil not to fire?

There are a few reasons for no spark, new coil pack could be defective, crank sensor, ignition module or bad wire in primary circuit, faulty ECM/PCM. You may have to have a good technician have a look, diagnose and estimate repair. Second link gives detailed instructions for testing and diagnosing coil pack.

What is the easiest way to check an ignition coil pack?

How to Test a Faulty Coil Pack Open the hood of your vehicle. Disconnect the negative battery cable. Disconnect the spark plug wires from the coil pack, one at a time. Use an ohmmeter to measure the primary resistance on the coil pack. Measure the secondary resistance on the coil pack.

How long do Harley coils last?

A Harley ignition coil is expected to last up to 100,000 miles if it’s properly maintained and if the spark plugs are replaced before they burn out.

How long do motorcycle ignition coils last?

Typically, modern ignition coils will last 3 days or 30+ years without much trouble in between. But that doesn’t mean they can’t go bad — and some do. Replacing one during the life of one of these bikes would be unexpected, though; replacing two indicates that you’ve got another problem in your ignition system.

Does a ignition coil have to be grounded?

The simple answer is no, the coil case does not have to be grounded for the ignition to work properly.

Should there be voltage on negative side of coil?

The power from the ignition switch need to go to the plus side of the coil and the negative goes the the distributor on a 12v system. That should be opposite what it was on a 6v positive ground.

Does negative side of coil go to ground?

One end of the secondary is grounded (the ‘negative’ terminal), the coil produces the voltage (the ‘battery’) and the output goes out the ‘positive’ terminal to the spark plug, where it jumps the spark gap and returns to ground, completing the circuit.

What wires go on the coil?

They usually required only three wires: the spark plug wire, the power wire and the ignition switch wire. Ignition coils of this type are usually a little larger than a soda can and are heavy because of the metal core and the field coil windings.

What does an ignition failure sensor do?

The IFS is responsible for keeping tabs on the voltage drop on the coils’ positive side so that your Engine Control Unit (ECU) can better monitor coil operation.