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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Diagnostic Tests >> DTC P0724: Brake Switch Circuit - High Input >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The stoplamp switch indicates the brake pedal status. The normally closed stoplamp switch supplies a battery voltage signal to the PCM. The signal voltage circuit opens when the brakes are applied.

If the PCM detects a closed stoplamp switch during decelerations, then DTC P0724 sets. DTC P0724 is a type "C" DTC.

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