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Old 11-04-2005, 01:08 PM   #1
nutsforchevys
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Exclamation I am needing a/c wiring diagram 78 k 1/2 ton

Checking to see if anyone might have a a/c wiring diagram that will work on my 78 1/2 ton 4wd. If you know where I can locate or if you have one please help.
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Old 11-04-2005, 06:57 PM   #2
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Re: I am needing a/c wiring diagram 78 k 1/2 ton

Is there a part specific you're looking for or just the whole thing? If the whole thing you can get repros or factory style off ebay from time to time.
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Old 11-04-2005, 08:29 PM   #3
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Re: I am needing a/c wiring diagram 78 k 1/2 ton

Thanks, I am having trouble with my A/C blowing fuses on high only. I havent had the truck long, so I am not for sure some hack hasnt been working on it before me. I have put a new relay, new resistor but that hasnt helped.
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Old 11-04-2005, 09:00 PM   #4
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Re: I am needing a/c wiring diagram 78 k 1/2 ton

I'm curious if the blower motor may be going bad as well.
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Old 11-05-2005, 11:32 AM   #5
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Re: I am needing a/c wiring diagram 78 k 1/2 ton

I can wire the fan direct and it seems to work fine.
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Old 11-06-2005, 03:33 AM   #6
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Re: I am needing a/c wiring diagram 78 k 1/2 ton

Sounds like the switch in the panel I would think maybe?
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Old 11-07-2005, 11:03 AM   #7
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Re: I am needing a/c wiring diagram 78 k 1/2 ton

Changed out switch in dash, blower motor, speed resistor and relay. This still did not fix it. It now blows cold Just cant put it on high. Guess I will have to settle for this now. Thanks for your help.
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