AC relay

Reply Subscribe

Thread Tools

Search this Thread

Jun 23, 2007 | 06:46 PM

FE352

Thread Starter

Senior User

Joined: Jun 2006

Posts: 218

Likes: 0

AC relay

My 1992 F150 AC hasnt worked since i bout the truck and the guy said it just went out, so i was assuming electrical since it was sudden. There is no power going to compressor, so id assume it is a relay or the switch. where is the relay for the AC? My owners manual doesnt say. thanks guys.

Jun 23, 2007 | 08:50 PM

lostin90s

Postmaster

Joined: Jul 2006

Posts: 3,978

Likes: 0

From: Central PA

Probably leaked off aka pressure switch. My pump would not work in my old truck unless I kept it charged. I know it needed all new seals as well as update . When was the last time it was professionally charged? They would dry out system and replace any problem areas. You did well most truck Out of the 18 Fords 6 years was it for AC then started to fix things on it.

Jun 23, 2007 | 10:05 PM

brown 4x4

Posting Guru

Joined: Jan 2001

Posts: 2,358

Likes: 3

From: Nebraska

Unlplug the low pressure switch on the accumulator and jumper the connector. Turn the key on and the a/c switch on. If you hear the clutch engage the electrical system is fine and you're just low on refrigerant (most likely) or have a bad low pressure switch.

Jun 23, 2007 | 11:37 PM

FE352

Thread Starter

Senior User

Joined: Jun 2006

Posts: 218

Likes: 0

so where is the low pressure switch? like i said though, i checked for power to the compressor with my light, and nothing...

Jun 24, 2007 | 09:23 AM

brown 4x4

Posting Guru

Joined: Jan 2001

Posts: 2,358

Likes: 3

From: Nebraska

There won't be if there's no pressure in the system. That's why you jumper the low pressure switch connector. It's on the passenger side near the firewall on the accumulator.