1999 ford f 150 ac control

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Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=115817
Printed Date: May 17, 2025 at 2:25 AM

Topic: 1999 ford f 150 ac control

Posted By: swwaltw
Subject: 1999 ford f 150 ac control
Date Posted: August 21, 2009 at 12:44 PM

i would like a wiring diagram for the manual ac control system. my ac compressor runs all the time. i want it to only come on with the ac and defrost settings. thanks for your help.

Replies:

Posted By: howie ll
Date Posted: August 21, 2009 at 5:49 PM

Sounds like you have the following:- faulty control relay, faulty sensor or faulty trinary switch. Compressor and AC system should engage when fan is turned to speed 1.

Posted By: swwaltw
Date Posted: August 26, 2009 at 8:48 AM

i'm sorry not all the time just when in any position panel, floor, de-frost, ect.. i only want it to come on when is it on a/c or defrost.

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