A/C making me mad!!!
Thread Starter
|
Senior User
Joined: Feb 2010
Posts: 224
Likes: 0
From: st cloud, MN
A/C making me mad!!!
hi, i have a 1991 4.0 5spd stx, and the A/C does not work. converted to r-134, and its full of freon. listen to this crap. no power at the low side pressure switch, or at the pump, tried to cross lowside but nothing happened, all the fuses are good and i have no flippin' clue whats wrong. must have stopped at about 5-6 different auto repair places and all the dumb poo intern whatchamacallits have no clue. maybe one of you on here can explain! please help!!! 
Senior User
Joined: Sep 2003
Posts: 394
Likes: 0
Start at the controlhead. It's easy to remove and check to see if you have 12 volts at it on the mode switch. You should have a wire (purple/green I think) that energizes when in AC and DEF modes. That lead heads to the Pass kick panel and is plugged into the harness that goes up and out on top of the Evap case. Then that purple/green wire goes to the Cycling switches, pressure switches, compressor.
Thread Starter
|
Senior User
Joined: Feb 2010
Posts: 224
Likes: 0
From: st cloud, MN
hhott, would you happen to have a diagram? im not up-to-date on termology. im more of the kind of person thats like its the box that looks like a circle with a bunch of wires going into it.
Senior User
Joined: Sep 2003
Posts: 394
Likes: 0
HAYNES manuals have the wiring for your truck.. About $20 at most any auto parts store, or book store.
There are only a couple of wires at the control head.
There is only one 6-8 pin plug at the pass kick panel that leads up to and out of the firewall/evaporator case.
There are only a couple of wires at the control head.
There is only one 6-8 pin plug at the pass kick panel that leads up to and out of the firewall/evaporator case.
Thread
Thread Starter
Forum
Replies
Last Post
Tylus
2004 - 2008 F150
74
Oct 25, 2019 02:18 AM
gxsalas
1973 - 1979 F-100 & Larger F-Series Trucks
2
Dec 13, 2015 12:46 PM
