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.
2004 Ford Mustang Mach 1, AutomaticFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| ABS Control Module (Cobra) | On right front of engine compartment, behind radiator. See Figure. |
| ABS Control Module (Mach 1) | On right front of engine compartment, behind radiator. See Figure. |
| ABS Control Module (3.8L) | On right front of engine compartment, behind radiator. See Figure. |
| ABS Control Module (4.6L 2V) | On right front of engine compartment, behind radiator. See Figure. |
| Constant Control Relay Module (CCRM) (Mach 1) | Inside right front fender, behind air filter housing. See Figure. |
| Constant Control Relay Module (CCRM) (3.8L) | Inside right front fender, behind air filter housing. See Figure. |
| Constant Control Relay Module (CCRM) (4.6L 2V) | Inside right front fender, behind air filter housing. See Figure. |
| Constant Control Relay Module (Cobra) | Inside right front fender, behind air filter housing. See Figure. |
| Daytime Running Lamps (DRL) Module (Cobra) | Left front corner of engine compartment. See Figure. |
| Daytime Running Lamps (DRL) Module (Mach 1) | Left front corner of engine compartment. See Figure. |
| Daytime Running Lamps Module (3.8L) | Left front corner of engine compartment. See Figure. |
| Daytime Running Lamps Module (4.6L 2V)) | Left front corner of engine compartment. See Figure. |
| Fuel Pump Driver Module (Convertible) | Underside of luggage compartment. See Figure. |
| Fuel Pump Driver Module (Coupe) | Underside of luggage compartment. See Figure. |
| Generic Electronic Module (GEM) | Below left side of dash. See Figure. |
| Inlet Manifold Runner Control (IMRC) Module (3.8L) | At right rear of engine compartment. See Figure. |
| Passenger Air Bag Module | At right side of dash. See Figure. |
| Passive Anti-Theft Transceiver Module | On underside of steering column. See Figure. |
| Powertrain Control Module | Behind right kick panel. See Figure. |
| Restraints Control Module | Behind lower center of dash. See Figure. |
Factory 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.