Type 44 Audi 100 no instrument illumination

Au200tq · 16-05-19, 09:03 PM

How do I find the earth point on the printed circuit of the instrument cluster so that I can trace the break in the circuit governing the instr. lighting?

larry49 · 16-05-19, 09:32 PM

Quote:

Originally Posted by Au200tq

How do I find the earth point on the printed circuit of the instrument cluster so that I can trace the break in the circuit governing the instr. lighting?

I would have thought to find the earth, probe with an continuity meter all the tracks/connections and a good earth, with the battery disconnected.

Au200tq · 17-05-19, 08:39 PM

Good idea. I'll find out which is the -ve connection to the instr.dimmer. I can then feed 12v to the +ve and see if the dash lights work.Thanks.

Sandro · 18-05-19, 08:34 PM

Did You check the relay?

Au200tq · 20-05-19, 04:57 PM

er .. I tried this some time ago, and it was ok

17-05-19, 08:39 PM	#3
Au200tq Grown up member Classic Audi Club Member Join Date: Sep 2012 Posts: 42	Instr. Lighting Good idea. I'll find out which is the -ve connection to the instr.dimmer. I can then feed 12v to the +ve and see if the dash lights work.Thanks.

20-05-19, 04:57 PM	#5
Au200tq Grown up member Classic Audi Club Member Join Date: Sep 2012 Posts: 42	Relay check er .. I tried this some time ago, and it was ok

18-05-19, 08:34 PM	#4
Sandro Grown up member Join Date: Feb 2011 Location: Chelmsford Posts: 651	Did You check the relay?