Chrysler Repair: No tail lights and brake lights when headlight on, filament bulbs, light bulbs

Question
i was wondering why my 2000 jeep grand chreokee laredo 4x4, the brake lights work great when the head lights ore off but when u turn the head lights on the brake light and the rear running lights dissappear???

Answer
Hi Larry,
While I don't have wiring diagrams for any Jeep other than '06 or so, I would check out the possibility that one of the combination running light/brake light bulbs is shorted to ground or there is a short in one of those sockets. Try removing one bulb at a time to see if the other side brake/tail then works. Then try the reversed of that. There is usually nothing in the wiring that ties together brake and running lights except for the 2-filament bulbs which they share.
Roland