Inspection and Verification

NOTE: If any concerns are noted with the speedometer, the stoplamps or the horn, address those concerns, referring to the appropriate articles, before continuing the speed control diagnosis.

NOTE: If the vehicle is a diesel, Refer to the INTRODUCTION - DIESEL .

Verify the customer concern.
Visually inspect for obvious signs of mechanical or electrical damage.

Fig 1: Visual Inspection Chart
Courtesy of FORD MOTOR CO.
If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
Verify the speedometer operates correctly by driving the vehicle. If the speedometer does not operate correctly, refer to INSTRUMENT CLUSTER- CONVENTIONAL or INSTRUMENT CLUSTER- NATURAL GAS .
If the cause is not visually evident, verify the symptom and GO to SYMPTOM CHART