Integral Generator Regulator (IGR) System

To test the voltmeter, turn the ignition switch ON, turn the headlamps ON and set heater blower/fan on HI with the engine stopped. The meter pointer should move toward the lower portion of the normal band (the white portion of the scale). If no movement of the needle is observed, check the battery-to-circuit breaker and circuit breaker to cluster wire connections. If connections are tight, and the meter shows no movement, check fuse and wire continuity. If fuse and wire continuity are good, remove cluster from vehicle. Check for flex circuit to clip/terminal continuity. If circuit is good, replace gauge.

1. If the charge indicator does not come on, disconnect the wiring plug connector from the regulator. Connect a jumper wire from wiring connector 'I' terminal to the negative-battery post cable clamp.
   
   
   
   

2. Turn ignition to RUN position with engine off. If indicator does not light, check for presence of bulb socket resistor. If resistor is missing, replace bulb socket. 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.

3. If indicator 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.

   NOTE: Charge indicator on with high generator output voltage.