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 MANUALSPONTIAC1991FIREBIRD FORMULA, 5.0 F, STANDARD, M39REPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORCONTROL UNITS
1991 Pontiac Firebird Formula, 5.0 F, Standard, M39
Control Units
1991 Pontiac Firebird Formula, 5.0 F, Standard, M39SECTION Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Air Bag Resistor Module | Behind left side of dash. |
| Audio Alarm Module | In convenience center. |
| Cruise Control Module | Behind right center of dash. |
| Diagnostic/Energy Reserve (DERM) Module 5.0L (VIN E) | Behind right side of dash. |
| Electronic Control Module (ECM) | Behind right side of dash. See Figure -4. |
| Elect. Spark Control (ESC) Module (5.0L VIN E) | On left side of firewall, behind brake booster. See Figure . |
| Headlight Door Module | On left side of firewall bracket, near wiper motor. |
| Pass Key Decoder Module | Behind right side of dash. |
| Wiper Motor Module | Mounted on wiper motor assembly. |
RENDER: 1.0x
NO RELATED
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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.