Instrument panel Volt Reg

[Huw Powell]

It's a nasty job, but redo all the trunk wires.

A shame Audi didn't do the type 89 like the Coupe, with a curly wire 
from the body to the trunk lid.

On 10/29/2013 12:02 AM, al wrote:
> Cody,
> I use an adjustable voltage regulator, so after starting I get 14.35 v that
> tapers down to 13.85 v. I like it high because I always have the AC on, the
> electric fans going strong.
>
> So yesterday I did some cable chasing.  I found that the lights are OK with
> external power applied. I have good voltage up to the connector in the
> trunk. So I had it isolated to the wiring from the inside conn. to the
> cable
> in the trunk lid.
>
> I first checked the outer cover on the cable, no cracks. I did notice the
> the cable runs along the left side hinge, and has a slight bend. Bends are
> troublesome, so I removed some of the outer covering and found four of the
> five wires broken. I peeled more outer covering finding more cracks or
> breaks in the cable. I stripped the cable about 5" in both directs.
> I need to pick up some 20-22 wire and then I can solder the broken wires
> back to normal, adding shrink sleeve before I start.
>
> Hopefully I won't find any more but I won't hold my breath.
>
> Mahalo again for your help.
> Al
> 1990 80 non-Q
>
>
> -----Original Message----- From: Cody Forbes
> Sent: Saturday, October 26, 2013 4:30 PM
> To: al
> Cc: Quattro
> Subject: Re: Instrument panel Volt Reg
>
> I suspect that you have two unrelated things you are checking. What is the
> battery voltage with the engine running?
>
> On a 5000 the instrument cluster lights go out if you have a license plate
> bulb out; they ran the ground through those bulbs. Get out your Bentley
> wiring diagram and check for power and ground on the connectors for the
> cluster lighting.
>
> -Cody Forbes (mobile)
>
> On Oct 26, 2013, at 8:46 PM, "al" <streichea001 at hawaii.rr.com> wrote:
>
>> Car: 1990 80 2.0 L
>>
>> Problem: Lost instrument lights
>>
>> Checked battery – 12.65 V
>>
>> Checked fuse – OK
>>
>> Pulled instr. panel
>>
>> Checked rheostat,  registered 0.0-20.5 ohms  looks good to me.
>>
>> Checked Voltage regulator, leads 1 – 2(Gnd), 11.75 V, should be battery
>> voltage (12.65 V). I wonder why this reading is low.
>>
>> Checked VR output , leads 3 –2 (Gnd), 10.00 V should be 9.50 – 10.50 V
>>
>> I am going to start tracing the wiring.
>>
>> Any ideas?
>>
>> Aloha.
>> Al
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