Please help!!! At wits end

smokeyjoe

New Member
Jun 28, 2011
1
0
0
Ok so hopefully one of you guys had the same problem that I'm having. NO A/C :( and i'm in Texas. = super hot. anyways this is what i've done so far. The low pressure switch checked out and is working fine, the a/c clutch WOT relay checked out ok, but decided to buy it anyways ( i was really hoping that something was wrong). but I'm not getting any power to the plug connector that goes to the wires for the a/c clutch. :( Fuses are good and unless there's another relay that I'm unaware of I'm pretty much at a loss. The wiring under the hood appears to be factory and never touched. (even the wire loom along the fire wall still appears to be in good shape). The car sat for ~10+ years but have ran into no major problems until now...

any suggestions? I'll buy a burrito to anyone who can point me in the right diretion and get this thing working. Because the next step is to trace the wires coming from the connectors that goes to the a/c clutch back to the firewall and that's too much of a headache to do.
 
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alscobra1

New Member
Jun 20, 2011
32
0
0
louisiana
You really need a wiring schematic. If you can find one and post it, I can help you. See if you can find one. Otherwise it's just a guessing game. I would say first is to find the compressor relay and jump it. Should have two hot pins, one ground, and one lead to the comp.
 

jrichker

StangNet's favorite TOOL
SN Certified Technician
Mar 10, 2000
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Dublin GA
lowendmac.com
Diagram courtesy of Tmoss & Stang&2birds
fuel-alt-links-ign-ac.gif


See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring Mustang FAQ - Wiring & Engine Info Everyone should bookmark this site.

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel, alternator, A/C and ignition wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

Complete computer, actuator & sensor wiring diagram for 88-91 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

Vacuum diagram 89-93 Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

HVAC vacuum diagram
http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif

TFI module differences & pinout
http://www.veryuseful.com/mustang/tech/engine/images/TFI_5.0_comparison.gif

Fuse box layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif
 

alscobra1

New Member
Jun 20, 2011
32
0
0
louisiana
Alright. First things first. Test light clamped to ground. Key to run. Pull the a/c relay. Test for 2 hot leads. Should have power to 2 terminals. It looks to be called the wot cut out relay.
 
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