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'88 5.0l Lx - A/c Problem

  • Thread starter Thread starter SADL UP
  • Start date Start date Aug 7, 2013
S

SADL UP

New Member
Aug 7, 2013
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2
Aug 7, 2013
#1
  • Aug 7, 2013
  • #1
Compressor seems to work fine, and the air blows cold....but only out of the vents in the footwells. I'm assuming it may be a blend door problem...either a vacuum leak / disconnect, or maybe there's a servo motor that operates the door that has gone bad? Any ideas?
 

boostfrk

10 Year Member
Aug 30, 2011
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Colorado
Aug 7, 2013
#2
  • Aug 7, 2013
  • #2
Check all the vacuum lines behind the dash. Sounds like one of them came loose/broke/cracked, etc.
 

jrichker

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Aug 7, 2013
#3
  • Aug 7, 2013
  • #3
Diagram courtesy of Tmoss & Stang&2birds



See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 88-91 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel, alternator, A/C and ignition wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif


Vacuum diagram 89-93 Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

HVAC vacuum diagram
http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif

TFI module differences & pin out
http://www.veryuseful.com/mustang/tech/engine/images/TFI_5.0_comparison.gif

Fuse box layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

87-92 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang87-92 PowerWindowWiring.gif

93 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang93PowerWindows.gif
 
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