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How To Test Harley Ignition Module

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 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 I know if I have a bad ignition module?

Signs of a Bad Ignition Module Acceleration Issues. The vehicle may shake, vibrate or jerk when the gas pedal is pressed. There may be hesitation or lack of power during increases in speed. Temperature Problems. A faulty ignition module can cause a vehicle to overheat. No Power. The engine may turn over without starting.

How do you test a ignition Control Module?

Connect the ground lead from the 12-volt test light to the negative terminal on the ignition coil. Have your partner crank the engine over several times. Your test light should flicker on and off. If so, your module is working properly and no further testing is necessary.

What does a Harley ignition module do?

The module sends a signal to the ignition coil, which turns 12 volts into thousands of volts to make a hot spark. The ignition coil is connected to the spark plugs through spark plug wires, which are specially designed for their specific duty.

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.

How do you test an ignition module with a multimeter?

Place the red lead of the multimeter on the positive coil terminal. Place the black lead to the battery negative terminal. Turn on the ignition switch to the “Run” position. The multimeter should read battery voltage at the positive terminal.

What happens when a ignition module goes bad?

a faulty ignition module can affect ignition timing, resulting in an engine that misfires and runs rough. the engine may also run well at low speed, but won’t accelerate well. 3. stalling: a failing ignition module can occasionally prevent the engine from getting spark, causing it to stall.

What causes an ignition control module to fail?

The common cause of one driver/transistor failing is a shorted ignition coil primary winding. This is a winding of wire within the ignition coil where each loop is separated by a very thin plastic coating.

Does ignition module need to be grounded?

Everything mounted to the engine is grounded through the engine . The voltage regulator might need to be grounded but that shouldn’t keep it from starting . The ignition switch shouldn’t need a ground unless it’s illuminated .

What year did Harley Davidson go to electronic ignition?

Solid state electronics made their way into the charging system for 1978, and by 1979 replaced the points with an electronic ignition system.

What year did Harley go to electronic ignition?

Another problem that arose in 1979 was that the motors were fitted with electronic ignition units, which were prone to failure. Many owners would swap the units for an older point-ignition system for reliability.

What is code P0320?

P0320 is a diagnostic trouble code (DTC) for “Ignition/Distributor Engine Speed Input Circuit Malfunction”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

Does ignition control module control fuel pump?

When the key is turned on, the powertrain control module (PCM) closes the fuel pump relay, which activates the fuel pump for about three seconds to pressurize the fuel injectors. When the engine starts, the CKP signals the PCM to keep the fuel pump and fuel delivery system running.

Will a bad ECM cause no spark?

It is extremely rare for a no spark condition to be the result of a faulty coil or ECM. Users get fixated on these items and jump to the conclusion they must be responsible for their problem because these items are easy to see and replace.

Can a ignition module cause misfire?

If the ignition module fails or has any problems it can lead to performance issues with the vehicle, such as misfires, hesitation, loss of power, and even reduced fuel economy.

How long do ignition modules last?

Life Span. Federal law in the United States dictates that the ignition coil and ignition module on new vehicles are warranted for at least two years or 24,000 miles, whichever occurs first. The insulation in the ignition coil will degrade over time, but many coils are designed to last 100,000 miles or more.

Can you drive with a bad ignition control module?

A failing ignition control module can be a real headache at times. It can produce a wide range of engine performance problems, including preventing the engine from starting or stalling the engine as you speed down the road, just to let you resume your driving a few minutes later, as if nothing had happened.

What is the difference between single fire and dual fire ignition?

Dual fire ignition systems fire both spark plugs from a single coil at the same time. Single fire ignitions separate the firing pulses, only firing the cylinder under compression.

Does a coil need to be earthed?

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

Why is it important that the ignition module be grounded?

Since the signal is tiny little millivoltage, a ground from the ignition module to the pilot burner (not to earth ground) is needed to insure that the signal gets to the module. Without this ground we get what technicians hate most — intermittent operation.

Can a ignition coil ground out?

If the tester lights or you see sparks, the windings are grounded out and the coil is defective. Many service manuals recommend temporarily substituting a known good coil for a suspected bad one. If the ignition works properly with the good coil, you will know the original coil was bad.