Control Units
CONTROL UNITS LOCATION
| Component | Location | |
|---|---|---|
| Audio Alarm Module | On bracket, to left of steering column. | |
| Cruise Control Module | On brake pedal bracket. | |
| Electronic Control Module (ECM) | ||
| 4.3L | Under driver's seat. See Figure. | |
| 5.0L & 5.7L - 1989 | Under driver's seat. See Figure. | |
| 5.0L & 5.7L - 1990 | Under driver's seat. See Figure. | |
| 7.4L - 1989 | Under driver's seat. See Figure. | |
| 7.4L - 1990 | Under driver's seat. See Figure. | |
| Elect. Spark Control (ESC) Module | ||
| 4.3L | Under driver's seat. See Figure. | |
| 5.0L & 5.7L - 1989 | Under driver's seat. See Figure. | |
| 5.0L & 5.7L - 1990 | Under driver's seat. See Figure. | |
| Glow Plug Controller (Diesel) | ||
| Diesel Component View | On left rear of intake manifold. See Figure. | |
| Diesel Engine Component View | On left rear of intake manifold. See Figure. | |
| Hot Fuel Handling Module | ||
| 5.0L & 5.7L - 1989 | Under driver's seat. See Figure. | |
| 5.0L & 5.7L - 1990 | Under driver's seat. See Figure. | |
| 7.4L - 1989 | Under driver's seat. See Figure. | |
| 7.4L - 1990 | Under driver's seat. See Figure. | |
| Hydro-Boost Elect. Delay Module | Behind left side of instrument panel. | |
| Light Driver Module (Diesel) | Under right side of dash. | |
| Power Door Lock Delay Module | Above left kick panel. | |
| Pulse Wiper Control Module | Taped to harness, at right side of steering column. | |
| RWAL Elect. Control Unit | In engine compartment on bracket attached to master cylinder. | |