I got problems with lights on my UK 1988 XJS. Here's the symptoms :-)
Front lights - No Probs
Drivers side - No Probs
Turn on side lights and bulb failure comes on even though all lights are
working as they should.
Left hand indicate only and no probs.
This applies to left hand rear only
Left hand indicate with side lights on and flasher works, side light will
dim and go bright alternating with the flasher, and the brake light will
flash just a little tiny bit.
Left hand indicate with side lights on and break lights and the side light
and break light will flash alternating with the flasher. the flasher light
is dim and the left side fog lamp will also flash but will be dim.
If I have the lights on and the rear fog lamps on, the the left hand fog
lamp is dimmer than the right side. But, if I give power to the fog lamps
(Via a bit of wire) to the fog lamps without the lights on then the fog
lamps both shine bright.
With the lights on, the only way I can get the bulb failure to go out is to
pull the light coloured wire from both bulb failure units in side the boot.
Just pulling either one off does not turn the bulb failure off.
Is there any test I can do to find out where the problem lies?