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 MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 278 (KEYLESS ENTRY SYSTEM & COMPUTER OPERATED LOCK SYSTEM)
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
Section 278 (Keyless Entry System & Computer Operated Lock System)
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION Section 278 (Keyless Entry System & Computer Operated Lock System)
WARNING: This page is about a different car, the 2003 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
- Description And Operation
- Diagnosis And Testing
- Keyless Entry
- Notes
- Special Tool(s)
- Principles of Operation
- Inspection and Verification
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test A: No Communication With The Generic Electronic Module
- Pinpoint Test B: All Door Locks Are Inoperative
- Pinpoint Test C: The Doors Do Not Lock/Unlock Using Remote Transmitter
- Pinpoint Test D: The Luggage Compartment Door Is Inoperative Using Remote Transmitter
- Pinpoint Test E: Panic Function Does Not Operate Correctly
- Keyless Entry
- General Procedures
- Removal And Installation
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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.