sagjohnson

Can anyone here tell me exactly where the exciter wire is on a 1989 Audi 100 quattro. I'm having that voltage issue when I start the car where the voltage needle stays at or below 12 until I rev the engine above 3000 rpm.

I've heard it's the exciter wire, but I cannot find it. I found a single blue wire on the passenger side front below the headlight, but there isn't anything obviously wrong with it. Is this the exciter wire. A mechanic told me it was on the driver's side, and I have to remove the radiator cowl to see it. I did that, didn't see anything.

Thanks in advance for your help.

Stephen Clark

It is a blue wire on the alternator. My mechanic fixed it for me. May not look bad, but could be corrosion on terminals. Replace it and all will be well.

Stephen Clark
89 100
Houston, TX USA