Jaguar XJS Fuel Pump Relay Parts
Showing 1 out of 1 part(s) found in our catalog.
Brand
Keyword
Subcategory
Mon-Fri 8-4 MST/PST (Arizona Time)
The average price of a Jaguar XJS fuel pump relay is between $2.89 and $2.89.
Where Is The Jaguar XJS Fuel Pump Relay Located?
For most Jaguar XJS models, you’ll spot the fuel pump relay tucked inside the trunk. Check along the right side, beneath the plastic or carpet trim panels next to the battery. Early-year cars sometimes hide the relay directly behind the rear seat back, just above or beside the inertia switch. Since Jaguar made quiet changes between years, a peek at your model’s wiring diagram can shed some light if you get stuck. Getting to the relay usually means peeling back the trunk lining or unscrewing a cover, so take your time. The relay itself is a rectangular module, a couple inches long, with a bundle of wires plugged in. Since you might see a few relays there, double-check the part number or the wiring colors before swapping anything.
What Are Common Symptoms Of A Bad Jaguar XJS Fuel Pump Relay?
A bad fuel pump relay on the Jaguar XJS often shows with a silent pump and a cranking engine that never fires up. Sometimes, you get a car that runs, cuts off without warning, then restarts after cooling off. Other times, you might notice the fuel pump doesn’t buzz or hum when you switch the key to the “on” position. Less often, stuttering, hesitation, or slow starting can trace back to a failing relay that still works part-time. The best quick test? Swap in a known good relay. If the car fires up, you’ve nailed it.
How Can I Test The Jaguar XJS Fuel Pump Relay?
Pull the fuel pump relay from its socket so you can check it. On the bench, use a multimeter to see if the coil side gets continuity (with 12V on the control pins). No continuity means the relay’s done for. You can jump the relay socket slots for the fuel pump and listen for the pump. That shows your wiring and pump still work. With the relay back in, have someone turn the key while you press a fingertip against the relay body. A healthy relay clicks when it activates. If you test the relay and it passes, but fuel issues remain, consider the wiring or fuel pump as possible culprits.
Which Jaguar XJS Fuel Pump Relay Should I Buy As A Replacement?
When picking a replacement fuel pump relay for your Jaguar XJS, match up the numbers stamped on your old one—Jaguar/Bosch/Lucas part numbers matter here. Pins and ratings need to line up. OE parts or a trusted European aftermarket brand usually hold up best in these cars. Steer clear of “universal” relays unless you’re sure, because the XJS can be picky about fit and function. If you’re hunting for a hard-to-find relay, classic British suppliers or Jaguar specialists often have options that work right out of the box.
Why Does The Jaguar XJS Fuel Pump Relay Keep Failing?
Repeated fuel pump relay failures on a Jaguar XJS usually point to high resistance or corroded wiring somewhere in the system. Sometimes a weak or dying fuel pump draws extra current, heating the relay until it burns out. Moisture is another big cause—bad trunk seals or leaky tail lamps can let water in, corroding the relay terminals. Always check grounds in the trunk and fuel pump harness, and look out for any signs of melted insulation or heat near connections. Swapping to a sturdy relay or a weatherproof socket is a smart move if relays keep giving out.
Where Can You Find Affordable Jaguar XJS Fuel Pump Relays?
AutohausAZ often has what you need for your Jaguar XJS, with prices that won’t sting and shipping that gets your relay to you quickly. Finding the exact fit is straightforward, and if it’s not right, their return process is hassle-free. They help take the stress out of keeping an older Jaguar on the road without breaking the bank.
