Inspection and Verification

Inspection and Verification

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

1. Verify the customer concern by operating the speed control system.

2. NOTE: Any aaftermarket modifications, including but not limited to those listed below may cause the speed control to not operate correctly:

^ Any wiring or lamp modifications affecting the brake lamp operation
^ LED brake lamps
^ Non-factory installed trailer wiring
^ Radios (speed sensitive, auto mute)
^ Remote starters and alarms
^ Lighting and electrical accessory modifications

Visually inspect for obvious signs of mechanical or electrical damage:

^ Visually inspect the speed control actuator and accelerator controls.
^ Visually inspect the speed control cable without removing it and ensure smooth cable operation. Inspect the speed control cable connection to the throttle body.
^ Visually inspect the accelerator cable without removing it and ensure smooth cable operation. Inspect the accelerator cable connection to the throffle body. Also check for cable interference with the carpet, bulkhead grommet, insulation and instrument panel wiring.

Visual Inspection Chart






3. If the fault is not visually evident, verify the symptom and Diagnosis By Symptom