Yellow Wire From Heat and A/C Control - Ford Mustang Forum
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post #1 of 6 (permalink) Old 06-30-2019 Thread Starter
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Question Yellow Wire From Heat and A/C Control

Hi All,

I had annoying air bag light blinking in my 92 fox body. In the process of removing the air bag control module I somehow disconnected the yellow wire from the heat and a/c control on the dash. I have no idea where is goes does anyone know? I have attached pictures for a better idea of what I am talking about.

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post #2 of 6 (permalink) Old 06-30-2019
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I'd try to pull up a wiring diagram.

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post #3 of 6 (permalink) Old 07-01-2019
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I believe that's a vacuum hose,not a wire.Look under the dash to the right of the steering column.It looks like the hose that goes to the vacuum motor which controls the defrost/panel vent.If this hose is disconnected,air will blow out of the defrost panel only.If you look at the diagram below on the left side where the yellow hose is displayed,you can see that no vacuum being present at that vacuum motor will move the door to the down position (making the air blow out of the defrost panel only) Vacuum being present at that vacuum motor will move the door to the up position (making the air blow out of the instrument panel vent registers instead) Rotating the knob to different positions directs vacuum to the various vacuum motors that control the various doors.
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my89foxbody likes this.

91 LX 342ci (10.5:1)
TFS 190cc (stage ll)
GT40 (tubular) intake
Lunati 61011(.549"/.565")
QA1 Coilovers
Weld ProStar XP's

Last edited by wbrockstar; 07-01-2019 at 09:42 AM.
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post #4 of 6 (permalink) Old 07-01-2019
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Looking under the dash from the backside.

Mustang Monthly Jan 2015- Feature
5.0 Mustang & Super Fords July 2005

Last edited by ALMOST STK; 07-11-2019 at 11:18 AM.
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post #5 of 6 (permalink) Old 07-01-2019
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Quote:
Originally Posted by ALMOST STK View Post
Looking under the dash from the backside.

Good pics.

91 LX 342ci (10.5:1)
TFS 190cc (stage ll)
GT40 (tubular) intake
Lunati 61011(.549"/.565")
QA1 Coilovers
Weld ProStar XP's
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post #6 of 6 (permalink) Old 07-04-2019 Thread Starter
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Thanks everyone! I would have never found it without those pics. I will wait till I get my new air bag module before testing it out but pretty sure I have it connected again.
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