Hi there, new here. my dash lights and gauges all don't work, I took the dash out and found that the one marked battery feed has no power but if i supply power to that and the 12v ignition feed when its on my desk everything lights up.
There is power to the 12v auxillary feed, can I just tap into that or is it only supplied at certain times? I tested the harness to find what ones didn't supply power. Also have issue with the seats don't work and the driver window, I'm guessing a break somewhere but don't know how to trace it. I have a fault tester coming in soon that is supposed to be compatible with this jag, so will see if it can read the other faults. any help would be appreciated thanks.

 

I hooked my battery up backwards and had the same issue

There are a couple maybe 3 in the left heelboard fuse box that blew and on replacement the instrument cluster recovered

Just a quick note , ask questions

 

As Parker suggests go after the fuses. There are heaps of them all over the car.
There are downloads available in this forum for schematics and fuse locations and their function.

 

fuses first....
if all the fuses check out the its time to consult the wiring diagram and see what colour the wire is and where it runs from and check its continuity in each section... to find a break somewhere.

 

See page 22

X300 1996 LWB.pdf (jagrepair.com)

Fuse left heelboard fuse box fuse # 5 and # 12

Fuse 5 is hot at all times and fuse 12 requires the relay in the corner of the fuse box to close to be hot

To test this relay ..........with the ignition key in the run position but engine not started , remove the relay and it should click in your fingers back to the open position , reinstallit and it will click closed

Swapping option is the left engine bay fuse box relay which in reality only runs your car horn