Still in the dark

[Huw Powell]

> I have stripped cleaned and tested the switch and dip/main assembly, there
> is nothing even remotely wrong in there. Neither does the plug that goes
> into it show any sign of stress/dirt/resistance at all.
> I'm sure there is no supply getting to the switch other than to the main
> flash which is, I assume, a separate supply.

Typically the flash feature has a separate (battery) supply in parallel
with the headlight switched supply.  (red wire...)

> Now I assume that the supply to the switch is one or both of the large pins
> in the plug, both of which show no sign of life. Can anyone lead me back
> from there to where they come from...

Now, also typically... your basic underhood fusebox headlight current
goes like this...

Big fat red wire from fusebox to ignition switch - battery 12v

big fat yellow wire from ign. sw. to headlight switch (run only) [this
current then goes via black/yellow to switch the LRR]

big fat white wire from headlight switch to hi/lo flasher switch.

Thence, yellow for lows and white/black for highs goes to the fuse box,
where they run through separate fuses for each side and out tot he
lights.

So I think you may have ignition switch trouble.

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/