My 1983 XJ-6 fuel gauge does not work on either tank. In fact, I’m don’t know if the tank switch over is working. This car was in storage for 3 years. I got it running very well, but I’m still trying to sort it out. This is one of the problems. Also, horn in operative.
Chris
Some reading for you:
http://www.jag-lovers.org/xjlovers/xjfaq/fuelchangeover.htm
http://www.jag-lovers.org/xjlovers/xjfaq/horn.htm
The fuel gauge sending units in the fuel tanks re known to fail. It’s not unreasonable to think that both of yours are kaput.
The usual test is to ground the sending unit wire with the key “on” and watch the fuel gauge needle. it should rise to the top. Try this on both tanks. If the needle rises you know the gauge itself, and the wiring, is OK. Remove the tail lights to access the wiring. You’re looking for the light green wire at each sending unit.
However…
The fuel gauge wires from the sending units go through the fuel tank switch. If the fuel tank switch it broken the above outlined test is invalid
Cheers
DD
Thank you, DD. Thank you very
The sending units inside the tanks will rust in position when the car sits in storage for a few years. Easy to replace though. Autohauz recently had new units for about $35 each, complete with gaskets and locking rings.
One mine both sending units failed because the positive wire corroded away (inside the tanks) and it was all rusty, also the floats were half full of petrol. If grounding the sending wire works, they are at fault. Make sure the tanks are empty enough! Still, maybe they are repairable because the resistor wire is looking fine, me being too cheap to spend $90 for fuel gauges, though certainly worth it. And, of course, the horn has that inline fuse (on bulkhead/firewall?), the wiper on the steering column if I’m not mistaken and then there’s that black relay below the air intake, even though Chris has probably sorted that out by now…
David