Resistance Test

Disconnect battery positive cable, connect a 0-300 scale ammeter between disconnected lead and battery. Connect a voltmeter with 10 volt scale between battery positive post and starter switch terminal at solenoid. Crank engine and observe voltmeter and ammeter readings. Voltage should not exceed.3 volt. A higher reading indicates high resistance caused by loose circuit connections, faulty cable, burned starter relay or burned solenoid switch contacts. A high current combined with slow cranking speed, indicates starter should be removed and repaired.