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.
1990 Ford Bronco II 4WD, Standard, M5OD-R1FACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location | |
|---|---|---|
| ABS Control Module | Behind dash, right of steering column, left of ashtray. See Figure . | |
| Distributorless Ignition System (DIS) Module (2.3L) | Vertically mounted on front of intake manifold. See Figure . | |
| EDIS Module (4.0L) | Right hand side of battery on radiator support. | |
| Electronic Engine Control (EEC) (Also ECA) Module | Behind right kick panel. See Figure . | |
| Electronic Shift Control Module | ||
| Bronco II & Super Cab | Behind driver's door pillar, behind trim panel. | |
| Ranger | On left lower rear of cab, behind driver's side seat. | |
| TFI Ignition Module (2.9L) | On distributor. | |
| Warning Chime Module | Behind dash, left of steering column. | |
| Windshield Wiper Module | Behind center of dash, left of ashtray. See Figure . | |
Factory Service Tools
Use the Manual With the Right Hardware
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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.