Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC1991SUNBIRD BASE, 4D SEDAN, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMS
1991 Pontiac Sunbird Base, 4D Sedan, Standard
Cruise Control Systems
1991 Pontiac Sunbird Base, 4D Sedan, StandardSECTION Cruise Control Systems
- Description & Operation
- Adjustments
- Testing
- Notes
- Isolation Test Procedure (V6 & 1992 4-Cylinder)
- Cruise Switch Short Test (V6 & 1992 4-Cylinder)
- Vent Circuit Open Test (V6 & 1992 4-Cylinder)
- Vac Circuit Open Test (V6 & 1992 4-Cylinder)
- SPS Circuit Open Test (V6 & 1992 4-Cylinder)
- Power Circuit Open Test (V6 & 1992 4-Cylinder)
- Brake Circuit Open Test (V6 & 1992 4-Cylinder)
- SC Circuit Open Test (V6 & 1992 4-Cylinder)
- R/A Circuit Open Test (V6 & 1992 4-Cylinder)
- VSS Circuit Open Test (V6 & 1992 4-Cylinder)
- VSS Circuit Short Test (V6 & 1992 4-Cylinder)
- SPS Circuit Short Test (V6 & 1992 4-Cylinder)
- Servo Short Test (V6 & 1992 4-Cylinder)
- Vac Circuit Short Test (V6 & 1992 4-Cylinder)
- Vent Circuit Short Test (V6 & 1992 4-Cylinder)
- Servo Actuation Test (All Models)
- Cruise Control Scan Tool Test (1991 4-Cylinder)
- Cruise Control Short Test (1991 4-Cylinder)
- Servo Resistance Test (1991 4-Cylinder)
- Trouble Shooting
- Removal & Installation
- Wiring Diagrams
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.