Generator On-Vehicle Tests

Troubleshooting or diagnosis is required before actual service can be made in the electrical system. Even where an obvious condition makes replacement of a component necessary, find out why the component failed. When a condition is diagnosed correctly, unnecessary service is prevented, the time the vehicle is out of service will be decreased and the condition will be properly corrected the first time.

NOTE: Refer to the Rotunda Alternator, Regulator, Battery and Starter Tester 010-00725 (ARBST) or equivalent Test Procedure Manual for complete directions on checking out the charging system.

In order to check the charging system, the use of Rotunda, Alternator, Regulator Battery and Starter Tester 010-00725 or equivalent tester is suggested.

When performing charging system tests, turn off all lamps and electrical components. Place transmission in NEUTRAL and apply parking brake.

CAUTION:
^ Do not make jumper wire connections except as directed. To do so may damage generator.

^ Do not allow any metal object to come in contact with the housing and internal diode cooling fins or a short circuit will result and burn out diodes.

NOTE: Battery posts and cable clamps must be clean and tight to make sure meter indications are accurate.