Operation CHARM: Car repair manuals for everyone.
Home >> Ford >> 1997 >> Thunderbird V6-3.8L VIN 4 >> Repair and Diagnosis >> Cruise Control >> Testing and Inspection >> Flow of Diagnosis
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Flow of Diagnosis

1. Verify the customer's concern by operating speed control system to duplicate the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART

Mechanical
- Inspect and verify
- Actuator cable is adjusted properly without holding the throttle open or increasing idle speed.
- Throttle linkage operates freely and smoothly when connected to the actuator cable and speed control servo.

Electrical
- Verify proper horn operation.
- Verify stoplight operation.
- Check circuit fuses, power distribution box fuses SPCNTRL/HEGO (10A) and HORN/DRL (25A), fuse junction panel fuse 11 (10A).
- Inspect and verify that:
- Connections are complete with no loose wires or terminals.
- Wiring is not broken, shorted or corroded.
- Wiring is not misrouted.

3. If the inspection reveals obvious concern(s) that can be readily corrected, service those concern(s).
4. If the concern(s) remains after the inspection, determine the symptom(s) and go to the Symptom Chart. Symptom Related Diagnostic Procedures
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