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 MANUALSMERCURY1991COUGAR LS, 3.8 4REPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEPOWER DOOR LOCKS
1991 Mercury Cougar LS, 3.8 4
Power Door Locks
1991 Mercury Cougar LS, 3.8 4SECTION Power Door Locks
- Description & Operation
- Component Locations
- On-Vehicle Service
- Adjustments
- Trouble Shooting
- Notes
- One Door Lock Does Not Work
- All Door Locks Do Not Work
- All Locks Work From One Switch Only
- Door Locks Operate One Way Only
- Door Locks Work With Engine Running Only
- Fuel Door Release Does Not Operate
- Locks Do Not Work In Below Freezing Weather
- Locks Work Intermittently
- Trunk Lid Release Does Not Operate
- Component Tests
- Removal & Installation
- Torque Specifications
- Wiring Diagrams
- Special Service Tools
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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.