Discourteous courtesy light...
Posted: Sun Oct 21, 2007 4:07 pm
Having endless problems with my courtesy light. It's never worked, so this weekend I began a drive on getting it lit. It doesn't work either from the door switches or from the roof switch. Now, at first the problem seemed simple: the wires coming out of the ceiling never came out under the dashboard, so weren't connected. Found those with a bit of searching, connected them up, no joy. (New bulb, tested and not broken). Took out the little light unit, that has the switch and three contacts on, and connected it directly to the battery: Nothing happened! With much testing it transpires that although with one wire connected to earth (ie the main body of the unit) and one the base terminal of the bulb itself, it lights, but if one tries to do with the one on earth and the other on the copper contact that rests on the bulb, nothing happens. I seem to have come across the singular phenomenon of non-conducting copper...
All right, that's not too bad. I can bypass the copper and connect the wire straight to the bulb, leaving the earths connected where they should be. That works.
HOWEVER (You'll see a lot of these!):
There is no current reaching the wires in the ceiling. One of them (the purple) had a black coating on the stripped copper, which quite clearly would hinder conduction. I removed it; nothing happened. All right, I thinks, I'll replace that wiring.
HOWEVER!
Before I did so, I put the bulb to the purple and black wires that come directly from the (brand new and fullly functional) wiring loom, bypassing the wires run through the door pillar etc, which were the ones which I suspected did not work. Well, how nice. The bulb did not light when connected directly to the wiring loom. You understand, where I'd put the bulb there was no form of connection except pure copper wire (maybe more of the non-conductive stuff?
) between the bulb and the fuse and control boxes. No light though.
HOWEVER:
I found that the upper fuse had gone. Replaced it, problem solved. All other electrical functions in the car work.
HOWEVER!!!
The two * wires from the fuse and control box- the purple and the black- still fail to light up the bulb.
So far, then, one may ascertain that the bulb works, the battery works, and everything else is a failure, but only with regard to the roof light, since every other function in the car works off the same loom. What can I do?
Where could the problem lie?
Actually there is one thing; in the control box the right-hand coil does not make any form of contact at all at the top, and there is a huge clearance between contacts, while the left-hand one is making contact, and has only a millimetre or two of clearance. Is this normal?
I think that's everything I feel!

All right, that's not too bad. I can bypass the copper and connect the wire straight to the bulb, leaving the earths connected where they should be. That works.
HOWEVER (You'll see a lot of these!):
There is no current reaching the wires in the ceiling. One of them (the purple) had a black coating on the stripped copper, which quite clearly would hinder conduction. I removed it; nothing happened. All right, I thinks, I'll replace that wiring.
HOWEVER!
Before I did so, I put the bulb to the purple and black wires that come directly from the (brand new and fullly functional) wiring loom, bypassing the wires run through the door pillar etc, which were the ones which I suspected did not work. Well, how nice. The bulb did not light when connected directly to the wiring loom. You understand, where I'd put the bulb there was no form of connection except pure copper wire (maybe more of the non-conductive stuff?


HOWEVER:
I found that the upper fuse had gone. Replaced it, problem solved. All other electrical functions in the car work.
HOWEVER!!!


The two * wires from the fuse and control box- the purple and the black- still fail to light up the bulb.
So far, then, one may ascertain that the bulb works, the battery works, and everything else is a failure, but only with regard to the roof light, since every other function in the car works off the same loom. What can I do?
Where could the problem lie?
Actually there is one thing; in the control box the right-hand coil does not make any form of contact at all at the top, and there is a huge clearance between contacts, while the left-hand one is making contact, and has only a millimetre or two of clearance. Is this normal?




I think that's everything I feel!