90 temp sensor wiring

[Huw Powell]

I just wanted to add that the new senders have three pins, in the same
four pin setup - there is no "+" connection required on them for
whatever that used to run.

> the sensor controls a few things, the temp gauge, the dash auto-check
> system, and an ac switch. i just had to rewire mine as the plug
> disintegrated.
>
> from the bentley for 80/90/cq:
>
> 1T = BL/BR
> 2/R = BL/W
> 4C = BL/Y
> 3/+ = BK/BL
>
>
> lead identification on the thermoswitch:
>
> ---------------------|
>  T          R  |
>  +           C |
> ---------^------------|
>
> +  carries plus voltage from terminal 15a
> C sends signal to overheat warning light above 120 C
> R goes to a/c safety switch
> T  sends signal to coolant temperature gauge.

--
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/