1994 Jaguar XJS lights do not work

1994 JAGUAR XJS
102,000 MILES • 6 CYL • 2WD • AUTOMATIC
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With the light switch in the full operating position the head lamps (high and low beam), turn signals, the brake lights above the trunk and the hazard lights will not come on. All other lights are working, park and side lights and rear tail brake lights. I have checked all fuses, relays and bulbs. Do you have any suggestion to solve this problem?
Dec 21, 2010 at 11:32 PM
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I would check the ground wire to the rear sockets, a loss of ground will cause this. The reason the running lights work is because of a ground back feeding through brake circuit. To test you should have power at one wire with headlights on, one with turn signal on and the other wire is the ground.
Dec 21, 2010 at 11:35 PM