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Home >> Ford >> 2008 >> E 250 V8-4.6L >> Repair and Diagnosis >> Cruise Control >> Testing and Inspection >> Pinpoint Tests >> Test A: The Speed Control Is Inoperative
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Test A: The Speed Control Is Inoperative

PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE

Normal Operation
The PCM sends a signal through circuit 151 (LB/BK) to the speed control switches, which passes through the clockspring. The return signal is sent to the PCM through circuit 848 (DG/OG) and the clockspring. When the brake pedal is applied the PCM deactivates the speed control if engaged.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PCM not configured for speed control
- Speed control switches
- Digital transmission range (TR) sensor
- Brake warning indicator system
- Output shaft sensor (OSS) signal
- PCM


A1-A6:






A6-A7:




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