AC trouble
#1
Instructor
Thread Starter
Join Date: Feb 2012
Location: Weeki Wachee Fl
Posts: 166
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I have an 1989 951 with no power to my compressor (clutch). The system is charged properly and the compressor works fine pressures good (jumped power direct to clutch). Relay, inside switch, DME temp switch all tested/replaced known good. What should I look at next. I am guessing it has something to do with the high pressure switch on the high side by the drier. The hi-pressure switch has four wires - two black/blue and two black. Any help is much appreciated as it is starting to get real hot down here.
#3
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Very interested in this thread. I have the same problem on an '89 S2. Not an emergency since it's down with a bad clutch (not the AC one). Would like to get the AC fixed for later this summer.
#4
Instructor
Thread Starter
Join Date: Feb 2012
Location: Weeki Wachee Fl
Posts: 166
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I tried to poke around with my meter today (to diagnose switch) and of course it decided to bug out now after 15 yrs of perfect use. Go figure! Anyway I pulled the switch p/n 964 613 137 00. Need to try and test or get another.
Last edited by Campbelljj; 04-15-2012 at 08:19 PM. Reason: mistake p/n
#5
#6
Instructor
Thread Starter
Join Date: Feb 2012
Location: Weeki Wachee Fl
Posts: 166
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Thanks Griffiths. I just jumpered the switch harness and the clutch engages no problem. I also checked continuity on the pressure switch and it failed. My guess is I need another switch. It seems this is the switch from 89 on from what I have researched.