Heater controls are dead?

89foxbodycali

Member

Apr 14, 2011

47

0

6

Hacienda Heights Ca

Apr 27, 2011

#1

• Apr 27, 2011

• #1

I got all the lines hooked back up and went to try it and nothing. Its like a fuse blew but theres juice from the plug that goes to the on off switch. When i try anything on the heater and ac control panel its all dead. Please help with any troubleshooting you can think of. Thanks in advance!

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Apr 28, 2011

#2

• Apr 28, 2011

• #2

Is the issue in the HVAC control knob or the fan motor circuit?

 

89foxbodycali

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Apr 14, 2011

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0

6

Hacienda Heights Ca

Apr 28, 2011

#3

• Apr 28, 2011

• #3

not sure what you meen? there is nothing from the controls, no fan nothing. every dial is dead. the only thing i could think of is that since the cars charging system doesnt work when the gauge cluster is out, maybe the heater controls are in the loop also? i dont know, im lost. going to work more on it today.

 

HISSIN50

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Apr 28, 2011

#4

• Apr 28, 2011

• #4

What on/off switch were you referring to in the first post? Where did you have power at?

 

89foxbodycali

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Apr 14, 2011

47

0

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Hacienda Heights Ca

Apr 28, 2011

#5

• Apr 28, 2011

• #5

i guess im calling them the wrong name. on the dash controls im refering to the knobs that say off floor and mix. the other one says hi through low. the power i found goes to the switch that says off floor and mix.

 

SMOKEDYA

20+ Year Stangneter

Jul 13, 2003

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Tucson AZ

Apr 28, 2011

#6

• Apr 28, 2011

• #6

89foxbodycali said:

i guess im calling them the wrong name. on the dash controls im refering to the knobs that say off floor and mix. the other one says hi through low. the power i found goes to the switch that says off floor and mix.

Click to expand...

The ones that say off floor mix areran off a vacume line comming threw the firewall,the fan is powered and the whole assembly is powered for lights.The hot/cold has like a hood release cable to it....So if the selector switch (floor defrost etc) dont work i bet it's the vac line.Also if there is no vac and you dont still have the vac canister thingy still they wont work till you start the car.peace



















john

 

HISSIN50

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15 Year Member

Nov 29, 1999

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Apr 29, 2011

#7

• Apr 29, 2011

• #7

The following might help (and help people refer to the same items):

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

http://www.veryuseful.com/mustang/tech/engine/images/mustang88AC_Controls.gif

If the blower motor is not functioning, checking power at the resistor pack is not a bad idea.

 

89foxbodycali

Member

Apr 14, 2011

47

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6

Hacienda Heights Ca

Apr 30, 2011

#8

• Apr 30, 2011

• #8

problem solved!

i never would of guessed this but it was the ignition switch. 11 bucks for the part and i bought the security torx bits but it solved almost everything. turn signals werent working also. i dug around some more and found that answer on another forum. iam grateful for everyone that replied and took time out of there day to help me. this is a great forum and happy to be a part of it!

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Apr 30, 2011

#9

• Apr 30, 2011

• #9

FWIW, turn signals, the radio and HVAC fan being inoperative are three symptoms of a bad ignition switch.