Starter Solenoid: Testing and Inspection

Make sure that the starter solenoid is isolated electrically from the starter motor. Measure resistance between S-terminal and M-terminal, and between S-terminal and ground (starter frame and magnet). It resistance is greater than 0.08 ohms, the conditions may exist:
1. Open wire; replace starter solenoid.
2. Ice, dirt or other foreign material preventing contact; service as necessary.

Solenoid S-Terminal Circuit Resistance
Check the resistance of the entire S-terminal circuit, including all the switches, wires and connections. Resistance should be less than 0.08 ohm.

Solenoid M-Terminal
1. Measure the resistance between the starter solenoid M-terminal and the starter solenoid housing.
2. If the resistance is greater than 0.08 ohms, replace the starter solenoid.