Load Test

1. Test the battery to determine its state of charge. Perform a load test using Rotunda Alternator, Regulator, Battery and Starter Tester (ARBST) 010-00725 or equivalent, to determine if the battery is serviceable.
2. If the starter motor won't crank with a fully-charged battery, connect the positive (+) lead of Rotunda 73 Digital Multimeter 105-R0051 or equivalent, to the S-terminal on the starter solenoid. Connect the negative (-) lead to the starter motor housing (do not disconnect the S-terminal wire).

NOTE: When disconnecting the plastic hard shell connector at the starter solenoid S-terminal, grasp the plastic connector, depress the plastic tab and pull off the lead assembly. Do not pull on the lead wire or damage may result.







3. Turn the ignition switch to the START position while watching the voltage reading.

If the voltage at the S-terminal is 8 volts or more, there is a starter motor or high current circuit malfunction. Perform the starter motor circuit checks explained later. Voltage Drop Test

If there is no voltage, there is a malfunction in the low current circuit to the S-terminal.

To find the problem in the low current circuit.

NOTE: If the starter solenoid is extremely hot, it may not function even though voltage at the S-terminal is 8 volts or more. Allow the starter solenoid to cool and test again.