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.
1987 Buick Electra BaseFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| ABS Controller | Under left side of dash, near kick panel. |
| ABS Logic Module | On body wiring junction block bracket. |
| Automatic Door Lock Controller | Behind right side of dash, on connector "C201". See Figure. |
| Body Computer Module (Cadillac) | Under right side of dash, above relay center. |
| Calibration Timer Module (Cadillac) | Behind right side of dash, near glove box. |
| Cooling Fan Control Module (Cadillac) | Behind left headlight assembly. |
| Cruise Control Module | Above accelerator pedal. |
| Digital Cluster Decoder Module | Under right side of dash, at top of connector "C201". |
| Elect. Climate Control Power Module | On right side of firewall, above blower motor. See Figure & 7. |
| Electronic Control Module (ECM) | Behind right side of dash. |
| Elect. Climate Control Programmer | Under right side of dash, near left side of glove box. |
| Elect. Spark Control (ESC) Module (Electra & Ninety Eight) | On right side of firewall in engine compartment. See Figure. |
| Keyless Entry Module | In trunk, above right wheelwell. |
| Key Pad Module | In driver's door, near lock motor. |
| Multi-Function Chime Module | Behind right side of dash trim, above glove box. |
| Power Seat Memory Module | Below right side of driver's seat. |
| PRNDL Module (98 w/digital dash) | Behind glove box. |
| Sun Roof Timer Module | In windshield header above right visor. |
| Theft Deterrent Controller | Under left side of dash, to left of steering column. |
| Twilight Photocell | In right defroster grille, top of dash. |
| Twilight Sentinel | Behind right side of dash, above glove box. |
| Wiper/Washer Motor Module | On left side of firewall in engine compartment. 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.
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