* Under the hood in the fuse box: Many Ford Rangers have the fuse box under the hood, often near the battery. The relay might be in the same box as the fuses, or it might have its own dedicated relay box nearby. Look for diagrams on the inside of the fuse box cover; it should label both fuses and relays.
* Under the dashboard: Some models had a secondary fuse panel or relay center located under the dashboard, often near the steering column or on the driver's side.
To find it with certainty:
1. Consult your owner's manual: This is the best and most reliable resource. The manual will have a diagram showing the location of all fuses and relays.
2. Look for diagrams on the fuse box covers: Both the under-hood and under-dash fuse boxes (if present) should have diagrams showing the purpose of each fuse and relay.
3. Use a multimeter (if comfortable): If you are comfortable using a multimeter, you can test the circuits going to the fuel pump to determine if the issue is the relay or something else. However, proceed with caution – working with automotive electrical systems can be dangerous if not done properly.
Without your specific model details (engine size, trim level, etc.), I can only offer these general locations. The owner's manual is crucial to pinpoint the exact location in *your* 1990 Ford Ranger.
