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Home >> Lincoln >> 2005 >> LS V8-3.9L VIN A >> 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


A1:






A1-A2:






A3-A6:






A6-A7:






Normal Operation
The powertrain control module (PCM) sends a signal through circuit 7-PG24 (YE/BU) to the speed control switch which passes through the clockspring. The return signal is sent through circuit 31S-PG1 (BK/BU) and the clockspring.

Possible Causes
- circuit 7-PG24 (YE/BU) open, short to voltage, or short to ground
- circuit 31S-PG1 (BK/BU) open, short to voltage, or short to ground
- circuit 31S-PG24 (BK/OG) open, short to voltage, or short to ground
- clockspring
- PCM
- speed control switch

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