Starter No Load Test PG260

Tools Required

Notice: Never operate the starter motor more than 15 seconds at a time without pausing in order to allow it to cool for at least 2 minutes. Overheating will damage the starter motor.

Important: Verify that both batteries are in good condition.

1. Disable the fuel system by removing the fuel solenoid fuse.
2. Calculate the current draw. Select the 200 A or 2000 A scale on the current clamp.
3. Zero the current clamp. Clamp the J 39200 to the negative battery cable.
4. Crank the engine. Observe the meter readings. The reading should be 330 - 360 amps. If the amperage is over 360 amps, an internal starter failure may be the cause. If the amperge is under 330 amps, a battery cable or connection may be the cause.