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07-13-2012, 09:17 PM | #1 |
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Join Date: Oct 2011
Location: Scottsdale Az
Posts: 5
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72 C10 heater/ A/c wiring diagram
I need a wiring diagram for the heater/ A/C for my 1972 C10. The blower motor only works on low and medium but not high. Mostly all the parts are new in the system so I think it is in the wiring.
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07-14-2012, 12:04 AM | #2 | |
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Location: Glencoe Alabama
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Re: 72 C10 heater/ A/c wiring diagram
Quote:
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72 Cheyenne super 10 08 3500 HD 4dr dually 12 ford flex (wifes ride) 76 Monte Carlo 83 Chevy short wide Silverado 96 Mazda Miata, 2000 Allegro Bus |
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07-14-2012, 02:32 PM | #3 |
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Join Date: Oct 2011
Location: Scottsdale Az
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Re: 72 C10 heater/ A/c wiring diagram
Thanks Ill check them... where is the relay for the high setting???
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07-14-2012, 02:43 PM | #4 |
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Join Date: Jan 2012
Location: Whitesboro, Texas
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Re: 72 C10 heater/ A/c wiring diagram
Most likely the relay - This link to another thread should help out.
http://67-72chevytrucks.com/vboard/s...=a%2Fc+diagram Good luck!
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Cheers - Wayne Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966 '55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157 1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy" 1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55 Nothing sucks more than that moment during an argument when you realize you're wrong. |
07-14-2012, 11:21 PM | #5 |
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Location: Glencoe Alabama
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Re: 72 C10 heater/ A/c wiring diagram
Mine is mounted/attached to the heater box under the dash behind the glove box. To the right side looking through the glove box door.
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72 Cheyenne super 10 08 3500 HD 4dr dually 12 ford flex (wifes ride) 76 Monte Carlo 83 Chevy short wide Silverado 96 Mazda Miata, 2000 Allegro Bus |
07-15-2012, 11:12 AM | #6 |
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Join Date: Jan 2007
Location: Keller, TX
Posts: 143
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Re: 72 C10 heater/ A/c wiring diagram
Just rebuilt my factory AC and here is what I found - I had the opposite problem than you - my low and med speeds weren't working but high was. The high side is your relay and it is mounted to the heater box behind the glove box. The low and med speeds are resistor related. The resistor is located inside the heater box under the dash. You will need to remove the plenum and air selector to access the resistor. I took mine out and cleaned it up and then replugged it in before I reinstalled it and tested it. I got lucky, it worked.
Good Luck
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