AC compressor no signal

matthew

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Join Date: Mar 2005

Posts: 167

Location: ohio

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#1

AC compressor no signal

06-11-2005, 04:22 PM

The clutch for my AC compressor won't kick on. I pulled the harness and tested for voltage. There is no voltage, even though there should be 12 volts when it's on. I checked and replaced the AC cutout relay and still nothing. Any ideas on where to start checking? AC fuse is good by the way and all the other climate control functions are working right.

I know some GM (general motors) vehicles have a low pressure cutout that kills the signal when they are low on freon (whatever they call it now) charge. Perhaps Fords have this?

Any help appreciated.

1991 GM GS sedan "Love Boat" HO converted, Holley adjustable fpr, 3.27 Trac-lok - RIP
1991 Colony Park LS "Wally World Express" HO, 3.27 trac-lok - RIP
1988 grand marquis ls "grey ghoul" - RIP 1992 gm ls "superbeater"- sold 1993 F350 dually 7.3 IDI crew cab flatbed "killer" - RIP
1994.5 F350 Dually Crew Cab Flatbed, Powerstroke 7.3 "overkill" - Alive and kicking
1987 Lincoln Town Car "El Presidente" - Resting for winter, gonna be a beast!
2008 Mustang, no name - belongs to the wifey
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Lincolnmania

Domestic Tourist

Join Date: Sep 2004

Posts: 17882

Location: Birdsboro PA.

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#2

06-11-2005, 10:02 PM

check the low pressure cutoff switch......wire up a jumper, if the compressor comes on when the plug is jumped, it's either a bad switch or a low charge

1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
2006 Lincoln Town Car Signature. Stock for now
1989 Ford F-250 4x4 much much more to come, sefi converted so far.
1986 Toyota pickup with LSC wheels and 225/60/16 tires.
2008 Hyundai Elantra future Revcon toad
1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

please be patient, rebuilding an empire!
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