Normal Operation
WARNING: This page is about a different car, the 2009 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
When the brake pedal is applied, the stoplamp switch closes and sends voltage to the PCM on circuit CCB08 (VT/WH) to deactivate the speed control if engaged.
The speed control deactivator switch interrupts the voltage signal to the PCM through circuit CMC22 (WH/GN) when the brake pedal is applied firmly. This is a redundant signal to the PCM.
- DTC P1703 (Brake Switch Out Of Self Test Range) - sets when there is an open or short in the deactivator switch circuits or an open or short in the stoplamp circuits.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals, or connectors
- Stoplamp switch
- Speed control deactivator switch
- PCM