5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

heating controls

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Old 10-28-2007, 02:44 PM
  #21  
brandon_g
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Default RE: heating controls

ya so I found the line from that bracket that the brake booster and ac line come from.I followed it and saw that it lead into the firewall and it goes into the glove box.Nothing was broken or anything.I looked at it for like an hour.I looked in the glove box and saw that the black wire was not even connected to anything though.I saw a blue white and red wire and black wire that lead back to the heating controls,but the black wire that came from the engine into the glove box was not connected to anything.I tried connecting it to the harness where the red blue and white wire were but im still getting only defrost on every setting I turn the **** too.I dont know what else to do.
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Old 10-28-2007, 04:45 PM
  #22  
mrdeep2001
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Default RE: heating controls

after connecting it, did you start your car? I think initially mine wasn't working after I hooked up the line until I started my car up.
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Old 10-29-2007, 03:13 PM
  #23  
brandon_g
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Default RE: heating controls

ah finally fixed.It turns out that there was a yellow wire behind the heater control that got discconected from some sort of what looks like a brass valve of some sort.There also was a line that broke off too.The ac line that breaks off and goes underneath the passenger front tire well.I fixed both of them but was just stupid and never had them fixed at the same tie lol.First I fixed the line but I had to unscrew the holder or whatever for the line would reach,that didnt work so I disconnected it and just screwed it back in.Then I found the that the yellow wire was disconnected so I reconnected that but still didnt work (because the ac line under the front wheel well was dis connected)but o well,its all better now.
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Old 10-29-2007, 07:51 PM
  #24  
ALMOST STOCK
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Default RE: heating controls

Glad to here it's working!!

You keep saying wire; butI assume you mean vacuum line?
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Old 10-30-2007, 10:25 AM
  #25  
brandon_g
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Default RE: heating controls

ya lol i mean vaccum line.Also I never said this but this never worked since I got the car,but now that its cold its kinda getting important.My back window defrost does not work.The button for it on the dash pushes in but does not stay in It just recoils back.And the light never goes on for it.Any ideas?thanks.
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Old 10-30-2007, 10:58 AM
  #26  
Brightersiderock
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Default RE: heating controls

wow i've been having this same problem for a few weeks now and came on here to start a topic about it, but now i don't have to. i'm gonna go check this out right now.
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Old 10-30-2007, 11:44 AM
  #27  
mrdeep2001
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Default RE: heating controls

Hey brandon,

Does the light come on/rear defrost work if you hold the button in?

Deep
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Old 10-30-2007, 03:04 PM
  #28  
brandon_g
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Default RE: heating controls

no It doesnt come on at all.I dont know where to look to see what I should try and do to fix it.
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Old 10-30-2007, 03:14 PM
  #29  
mrdeep2001
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Default RE: heating controls

Does anyone know if you can just swap the turn signal and hazard flashers to see if itll work? Dont try it just yet, I am not familiar with your car and dont want to damage anything.

Do you have a repair manual? If so, look up how to test the turn signal flasher.
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