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Old 07-21-2006
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Vacuum leak? Vents no longer work

ok so i went out and got some tap connectors and installed the green wire to the grey/white wire on the a/c... but it doesnt work, and wont turn on the fan with the truck in a/c....

and now my vent doesnt work untill i have it at full blast....

also it only turns on defrosser no matter what the possition... so wtf did the stupid fan do to my truck?

Last edited by jtslmn720; 07-21-2006 at 07:25 PM.
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Old 07-21-2006
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Check all connections? Make sure the metal contact broke through the wire insulation on the tap connector? Check your ground?
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Old 07-21-2006
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jeff, we may have to check the wiring diagram for your 99 to make sure that the gray/white is still the ac clutch wire for that year.
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Old 07-21-2006
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nope i just checked, it should be the gray/white wire on a 99
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Old 07-21-2006
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yea but why would my vents just suddenly not work?

...just checked all my fuses and theyre all still intact so wtf could have happend? ...

Last edited by jtslmn720; 07-21-2006 at 08:37 PM.
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Old 07-21-2006
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not sure jeff, if you take the green wire off, does everything work again?
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Old 07-21-2006
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nope they still dont work...but i can turn on/off my a/c compressor with my switch still...

the a/c clutch would have a fuse correct? so its not like i shroted out the clutch or motor or something...

Last edited by jtslmn720; 07-21-2006 at 08:54 PM.
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Old 07-21-2006
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you may have blown the blower motor resistor(just a thought) that could explain why its not comming on except for high

*An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121C (250F) interrupting the blower motor operation in all speeds except HI*

Last edited by Premierranger99; 07-21-2006 at 09:17 PM.
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Old 07-21-2006
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i think u should have tapped the purple wire.

sorry had to say it.

sorry about your luck, you checked all the fuses under the hood? and hte relays? maybe chage the blower relay out
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Old 07-21-2006
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^ pruple wire is guna be the one i use, i just wired up a switch so it will be easy jsut to tap into that...

i didnt check the releys, but i checked the blower fuses and a/c fuses and they were fine..
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Old 07-21-2006
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The vent control should be vacuum actuated.. check for a vacuum line thats off.
as far as the blower not sure however look for simple problems and dont just throw parts at it.
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Old 07-21-2006
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^ ok that makes sense, my cel is on because of my egr sensor (or valve i forget what they said) so amaybe thats whats screwing it up... but its been on for so long and my vents have always worked....
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Old 07-21-2006
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Quote:
Originally Posted by 4X2XLT
^ ok that makes sense, my cel is on because of my egr sensor (or valve i forget what they said) so amaybe thats whats screwing it up... but its been on for so long and my vents have always worked....
your dpfe sensor is not gonna mess up you ac if thats what your thinking
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Old 07-21-2006
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so wait, did you put a manual switch on the green wire too?
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Old 07-21-2006
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^ no, the green went straight to the grey/white a/c clutch wire... im gunna double check my connection to my "extention" wire tom and see if that wasnt connect right or what...
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Old 07-21-2006
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ok so me and premier, mostly premier, ahve narrowed it down to the blower motor resistor, the function selector switch assy or the blower switch....


any input?
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Old 07-21-2006
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when you tap into the PURPLE wire.....split the wire you tap into it and put each side on a switch.......i did this and it allows the fan to come on with the a/c and it also allows me to be able to turn it off while going down the interstate!!...........

sorry i know this is off topic....just a suggestion if you want a switch!
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Old 07-22-2006
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any update?
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Old 07-22-2006
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nope, i got the fan to turn on with the a/c now, but kinda pointless because i cant use the a/c...

im probably gunna go out today and get a new resistor and see what happens...any info on how to install it?
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Old 07-22-2006
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ok, i think i now know what it is... i remeber you saying that all the vacuum lines go to the passenger kick pannel... well i can hear air rushing in on that area, and when i took off the pannel, i can hear it, but i just cant locate the leak...

you have a diagram or something of what the area might look like?

http://img.photobucket.com/albums/v2...umlines003.jpg
http://img.photobucket.com/albums/v2...umlines002.jpg
http://img.photobucket.com/albums/v2...umlines001.jpg

and theres what im working with...

update::: i got it to work, and was happy, but then it jsut suddenly stops working and goes back to only at max, and only coming out of the defroster;....

Last edited by jtslmn720; 07-22-2006 at 01:57 PM.
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Old 07-22-2006
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OK, i know for sure that i have a vacuum leak because my trucks driving all funny and the power just bottoms out everyonce and a while, so this might be the cause of why my vents work intermitantly...

or could it still be an electrical probelm? either way, its going into a shop to get the vacuum lines repaired because i cant figure out where its leaking on the hose, i just know the general location...
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Old 07-23-2006
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Good luck, give us an update when it's all fixed up
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Old 07-24-2006
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ok so i went to a shop today where my dad knows the guy so we wouldnt get screwed, and hes saying just what priemer said in that its probably the blower motor risistor or relay... and then the function control switch...

ive found the resistor on autozone but does anyone know the location of it, and how to put it in?

also any info on where i could get a new selector? JY? parts store? ford?
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  #24  
Old 08-09-2006
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Quote:
Originally Posted by 4X2XLT
^ ok that makes sense, my cel is on because of my egr sensor (or valve i forget what they said) so amaybe thats whats screwing it up... but its been on for so long and my vents have always worked....

haha i have the same problem with my egr i need to get it fixed already... I dont have any problems with my blowers though.
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  #25  
Old 08-09-2006
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If the vents are malfunctioning its a vacuum issue.
If the blower is its an electrical issue.

The vents will actuate with the ignition OFF.. provided there is residual vacuum.
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