Headlight problem, still got

[Huw Powell]

> The car is an '82 Coupe with the four headlight system. When I got 
> the car a few weeks ago, the driver's side low beam was out.

> A few days ago the light went out again. It had been a very cold week
>  and list members have suggested the switch is temperature sensitive.
>  Using a test light, I am unable to find power at the socket or the 
> fuse. List members suggested it was the switch. That seemed logical 
> since Audis run the power through the switch. I couldn't get a new on
>  so I took one from a 70K '86 4000S I came across. I put that switch 
> and the problem persists. It is possible the switch is bad.

That sounds a bit weird, since a 1982 coupe would have the strange early
"push pull" switch on the cluster surround, and the 86 4k would have the 
later rotary type switch.

> If anyone has a diagram available, I would appreciate the following:
> 
> Color code for low beam wire from the switch.

Low is yellow, high is white.  But, there is no "low beam" wire at the 
switch.

> Am I correct in assuming that there is only one low beam wire from 
> the switch and that it divides somewhere before the fuse box. I have 
> heard of Audi switches burning, so I am assuming that the fuse is 
> after the switch. Is that correct?

The current track is:

1. unfused 12v:
from battery circuit for parking lights = red
from ignition switch "X" for headlights = black/yellow

2. light switch switches a white wire to the

3. dip (hi/lo) switch (this is where low beam wires start)

4. back to fuse box and fuses, single wire for high (W/Bk), single for 
low (Y/Bk).

fuse 1 = left low, 2 = right low, 3 = left high, 4 = right high, all 8 amps.

5. wires to lights - low is yellow and yellow/black, high is white and 
white/black.  The black striped wires go to the left side lamps.

6. and finally, brown ground wires from the lights to a chassis ground 
on the left side of the engine compartment.

The 82 coupe will also have the crappy underdash fusebox, which is a 
source of many electrical nightmares.

since you only have trouble on one side, the earliest place the problem 
can occur is at (4), in the fuse box.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/