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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1081 (Body Control System) >> Diagnostic Information and Procedures >> DTC B1507 or B1508: High Power Control Circuit Low/High >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) monitors the load control circuit for opens, shorts to ground and shorts to voltage.

The circuit starts at the BCM and travels to the IP fuse panel where the circuit splits to supply power for the heated seat switch and HVAC control head for the rear defog relay driver.

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