Charge Lamp System Test

NOTE: The Integral Alternator Regulator (IAR) has a circuit in the regulator that will indicate a high battery voltage condition by illuminating the charge indicator (battery light).

1. If the charge indicator lamp does not come on, disconnect the wiring connector from the regulator.

Jumper Wire:

2. Connect a jumper wire from the wiring connector I terminal to the battery negative post cable clamp.
3. Turn ignition switch to run position, but do not start the engine. If indicator lamp does not light, check for presence of bulb and resistor. If resistor is present, check for contact of bulb socket leads to the flexible printed circuit. If good, check indicator bulb for continuity and replace bulb if burned out. If bulb checks good, perform regulator I circuit test. Regulator I and/or S Circuit Test
4. If indicator lamp does light, remove jumper wire and reconnect wiring plug to regulator. Connect voltmeter negative lead to battery negative post cable clamp and contact voltmeter positive lead to regulator A terminal screw. Battery voltage should be indicated. If battery voltage is not indicated, service A circuit wiring.
5. If battery voltage is indicated, clean and tighten the ground connections to the engine, alternator and regulator. Tighten loose regulator mounting screws to 1.7-2.8 Nm (15-25 in lb).
6. Turn the ignition switch to run position with the engine off. If the indicator lamp still does not light, replace the regulator.