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Home >> GMC >> 1998 >> Forward Control 6.5 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Engine Control System - Tests W/Codes - DTC P1537-U1193) >> DTC P1663 >> DTC P1663: Generator Light Control Circuit (3.8L "G" Body) >> Circuit Description

Circuit Description

WARNING: This page does not describe the selected car, but rather 65 other vehicles, including the 1999 Saturn SW2, 1999 Saturn SW1, 1999 Saturn SL2, 1999 Saturn SL1, and 1999 Saturn SL. However, it is still accessible from the selected car via links, so may be relevant.

PCM turns on bulb, LED or driver information center indicator by supplying ground through the PCM. DTC will set when ignition is on, an improper voltage level has been detected on generator light driver circuit and conditions are present for at least 30 seconds.