Starter Solenoid: Testing and Inspection

Make sure that the starter solenoid is isolated electrically from the starter motor. Using a Rotunda 73 Digital Multimeter 105-R0051 or equivalent, check for resistance between S-terminal and M-terminal, and between S-terminal and ground (starter frame and magnet.) If resistance is greater than 0.08 ohm, these conditions may exist:
^ Open wire; replace starter solenoid.
^ 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. Check the resistance between the starter solenoid M-terminal and the starter solenoid housing.
2. If resistance is greater than 0.08 ohm, replace the starter solenoid.