My father has a 1994 E34/M50 that keeps blowing the fuse for the
internal lights. It seemed as if the problem was with the switch for
the trunk lid, but it doesn't appear that's the case. Apparently
there's a short somewhere, but we're having trouble tracking it down.
Here's what has happened:
He would go to the gym, open the trunk, take out his bag and all was
well. The trunk light would work. Close the trunk, go into the gym,
come out, open the trunk and the light wasn't working. Fuse blown.
This has happened several times. Yeah, we know, if the fuse keeps
blowing, then something's doing it for a reason. But he's been letting
this happen to try to diagnose the problem. (He's not stupid with this
as he's an electrical engineer by trade.) He's tried moving around the
wire harness around the trunk hinge to reproduce the problem, but no dice.
Since the problem seemed to be associated with opening and closing the
trunk he disconnected the trunk switch for the light to see if the
problem was with the switch itself. Fuse still blows. So that's not
The latest experiment involved locking the car and then pulling on the
driver's door to turn on the interior lights. (Trunk switch is still
disconnected.) Lights turn on then eventually fade out as they're
supposed to. He does this three or four times and things work fine.
The next time he does it, the lights don't turn on. Fuse is blown.
So the problem is elsewhere. He has a Bentley manual and has the wiring
diagrams to refer to, but he doesn't know where to start looking. Does
anybody know where the problem lies?
So you're a feminist...Isn't that cute