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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Diagnostic Tests >> DTC P0724: Brake Switch Circuit - High Input >> Circuit Description

Circuit Description

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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.