'91 Coupe Quattro headlights out

[Huw Powell]

I agree, that's why there is 12v on the ground side of the bulb.

On 3/3/2013 3:14 PM, Mike Arman wrote:
>>  wadd-wadd at usa.net wrote:
>>> The headlights of my CQ do not come on. I have been running relayed
>>> headlight
>>> harness with euro lights for 20 years.
>>>
>>> When I check the voltage at the 3 wires that go to the H4 bulb, I am
>>> getting
>>> 12V at all wires injuring ground. I am baffled. What's causing this, the
>>> headlight switch?
>
>
> Bad ground.
>
>
> Rework the ground leads and report back ;-)
>
>
> Best Regards,
>
> Mike Arman
> 90V8Q
>
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