Author Topic: Ac control unit: Bulb replacement?  (Read 14360 times)

Offline Skunksmash

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Ac control unit: Bulb replacement?
« on: October 28, 2008, 04:01:26 am »
I would like to know the best way to go about replacing the bulb in the air conditioning control unit. I am talking about that little unit that you see every time you get in your truck. It has levers on it that control blower motor speed, hot/cold air, and AC on/off, among other things. Mine no longer lights up, and at night it is a real pain cause i can not see anything on it when i want to use it. I assume that you can pull the unit out, but is there a little bulb inside it or something?

Offline zieg85

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Re: Ac control unit: Bulb replacement?
« Reply #1 on: October 28, 2008, 06:19:11 am »
4- 7mm bolts hold it in, the bulb is right there, easy to change
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline Skunksmash

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Re: Ac control unit: Bulb replacement?
« Reply #2 on: October 28, 2008, 08:54:51 am »
What about a totally new unit? My face has a big crack in it.

Offline GoatBeard

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Re: Ac control unit: Bulb replacement?
« Reply #3 on: October 28, 2008, 09:19:47 am »
Is there one bulb in those or one bulb on either side of the unit -- I noticed that mine is real bright on one side and not so bright on the other side...

Offline JJSZABO

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Re: Ac control unit: Bulb replacement?
« Reply #4 on: October 28, 2008, 09:58:38 am »
Mine is a single bulb unit.
Jeff

86 Chevy C-10
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Ex father and son project (son lost interest)

Son regained interest when truck was almost completed

Offline Skunksmash

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Re: Ac control unit: Bulb replacement?
« Reply #5 on: October 28, 2008, 10:07:17 am »
I bet a brand new one from somewhere is like $500.00

Offline VileZambonie

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Re: Ac control unit: Bulb replacement?
« Reply #6 on: October 28, 2008, 10:07:27 am »
My face has a big crack in it.

You totally set yourself up right there!  :D
,                           ___ 
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Skunksmash

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Re: Ac control unit: Bulb replacement?
« Reply #7 on: October 28, 2008, 10:08:58 am »
Naw seriously though, do yall know of anywhere that you can just buy the clear plastic face for the unit?
« Last Edit: October 28, 2008, 10:11:05 am by Captkaos »

Offline Captkaos

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Re: Ac control unit: Bulb replacement?
« Reply #8 on: October 28, 2008, 10:12:18 am »
There is only 1 bulb in all of them.
It has been a while since I looked at one, but I seem to remember that the face doesn't come off easily.

Offline GoatBeard

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Re: Ac control unit: Bulb replacement?
« Reply #9 on: October 28, 2008, 02:44:33 pm »
Is the bulb fixed in place or is it one of those on the end of a wire that could be moved around?

Just wonderin' why mine would be bright on one side and not on the other -- only thing I can figure is that the bulb moved.   ???

I would think you could easily find a plastic "face" in a junkyard.

Offline hotrod24

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Re: Ac control unit: Bulb replacement?
« Reply #10 on: October 28, 2008, 03:24:33 pm »
1980 1/2 ton shortbed project...
1978 pontiac grand prix...

Offline Captkaos

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Re: Ac control unit: Bulb replacement?
« Reply #11 on: October 28, 2008, 03:33:37 pm »
Yes the bulb has a socket that it locks into.

Offline Prong

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Re: Ac control unit: Bulb replacement?
« Reply #12 on: October 28, 2008, 08:16:14 pm »
The bulb is on the right side of the control unit. You don't have to remove the unit to replace it, just carefully snake your hand around the vent cables. Just be careful not to knock off the vacuum lines from the control head--then you'll have to pull the unit to fix that and the bulb (don't ask how I learned that).
79 K10 SB 4x4 383/Th350
79 K10 LB 4x4 350/SM465

Offline Prong

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Re: Ac control unit: Bulb replacement?
« Reply #13 on: October 29, 2008, 04:00:50 am »
While we're on the subject, does anyone remember the bulb part number? Mine recently burnt out and it's been awhile since I replaced it and can't remember what it is.
79 K10 SB 4x4 383/Th350
79 K10 LB 4x4 350/SM465

Offline Skunksmash

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Re: Ac control unit: Bulb replacement?
« Reply #14 on: October 29, 2008, 07:15:30 am »
There is only 1 bulb in all of them.
It has been a while since I looked at one, but I seem to remember that the face doesn't come off easily.

Yeah i have taken one off but it's a pain, and thus i imagine that finding a replacement one would be real hard. Probly have to buy a whole new unit for a million bucks.