rear lights playing up.. stupid things.

[BOOSTDEF]

Hey,

now i assume this would be a faulty connection, but the problem is where.

Ive got an EF with the factory rear spoiler. Now sometimes when i turn the lights on, there will be no lights whatsoever coming from the the rear tail lights(no brakes, or tail lights). However, the spoiler light and the light in the rear window stay on. Now, when i give the door a slam, or hit near the rear rhs break lights(the side the wires run down), the rear tail lights will come on. But when i put my foot on the breaks, they will go off and then its back to the spoiler and the other light..

Whats the go?? lol where is the factory spoiler joined to the wiring??

Cheers.