I checked the relay plate.

Pin 31 is ground. No problem there.

Pin 30 is the signal from the low pressure switch. Currently, 0v, due no system pressure.
I've bridged the switch to give a hi signal, 30v. This is also connected to the Ac control head.
Pin 87 is the output to the compressor clutch.
Pin 87a is going to the Motronic(kick down?) (idle control?)
Pin T is getting nothing


Zuletzt bearbeitet von Mark Hanman; 15.09.2014 11:18.
85 WR quattro
90 V8 Silver, 91 V8 Black, 93 V8 Lago
93 100e quattro V6. Titan, i think