Alternator Warning Light
- Visually check alternator belt and wiring. On vehicles without charge indicator light, go to UNDERCHARGED OR OVERCHARGED BATTERY TEST . On vehicles with charge indicator light, go to next step.
- Turn ignition switch on, with engine off. Indicator light should come on. If indicator light comes on, go to step 4). If indicator light does not come on, disconnect alternator harness connector at alternator. Using a fused jumper wire, connect one end of jumper wire to alternator harness connector terminal "L" and other end to ground. See Figure.
- If indicator light comes on when jumper wire is connected, replace alternator. If indicator light does not come on when jumper wire is connected, locate open between grounding lead and ignition switch. Charge indicator light bulb may be open.
- Start engine and operate at moderate speed. Charge indicator light should go off. If indicator light stays on, disconnect alternator wiring harness connector and check light. If indicator light goes off, replace alternator. If indicator light stays on, check for grounded wire to alternator wiring connector terminal "L".