To find it, you'll need to consult your owner's manual (if you have it) or a wiring diagram specific to your van's engine. The relay is typically located in one of these places:
* Under the hood in the fuse/relay box: This is the most common location. The box is often near the battery or firewall. The box itself will have a diagram showing relay positions, but you may need to compare it to a wiring diagram to be certain.
* Inside the passenger compartment fuse box: Less common, but possible on some models.
To help you find it more effectively:
1. Identify your engine: Knowing the engine type (e.g., 4.9L inline-6, 5.0L V8, 5.8L V8, 7.5L V8) will greatly help in locating the correct wiring diagram online.
2. Use a wiring diagram: Search online for a wiring diagram for your specific 1990 Ford E250 van and engine. These diagrams will show the fuel pump relay's location and circuit. You can find these on sites specializing in automotive repair information (some are paid subscriptions, others offer limited free access).
3. Look for labels: Once you've located the fuse/relay box, carefully examine the relays. Some may be labeled.
4. Use a multimeter: If you're comfortable using a multimeter, you can test relays to find the fuel pump relay. However, this requires some electrical knowledge.
Without the engine details, giving a precise location is impossible. Consult a wiring diagram—that's the best way to find the relay for your specific vehicle.
