Alternator works but...

[Huw Powell]

> Ok, it turns out the alternator is working. I get 13.8 volts at the
> battery with the car running, however the dash indiactor lamp
> operates in reverse. It is off when the ignition is on without the
> engine running. After I start the engine it remains off untill I rev
> the engine, then the light sticks on. Also the tach does not work.
> Any suggestions on that now?

In tandem with your last post, I am assuming this is an '83 UrQ... here 
is what to do (warning, big work ahead).

Get an 85-87 coupe GT parts car.  Strip all it's wiring, and the 
underhood fuse box, and cut out the metal where the fuse box went.

Strip your UrQ, except for engine management circuitry.

Replace with the (better) later coupe wiring harnesses, and install the 
underhood fuse box.

What, you wanted an easier answer?  The underdash fusebox is a 
nightmare, there were even early TSB's to move and rewire the FPR so it 
would work right, as I recall.  Its connectors are always getting funky 
and dying or melting, etc. etc......

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/