On-Vehicle Testing: Notes
NOTE:
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.
CAUTION:
Do not make jumper wire connections except as directed. To do so may damage generator.
CAUTION:
Do not allow any metal object to come in contact with the housing and internal diode cooling fins with key on or off or short circuit will result and burn out diodes.
NOTE:
In order to check the charging system, the use of Rotunda Starting and Charging Tester (VAT-40) 078-00005 or equivalent tester is suggested. Refer to the Rotunda Starting and Charging Tester VAT-40 Test Procedure Manual for complete directions on checking out the charging system. Battery posts and cable clamps must be clean and tight to ensure accurate meter indications.
NOTE:
When performing charging system tests, turn OFF all lamps and electrical components. Place transmission in PARK and apply parking brake.