1975 deVille Climate Control problem
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The Classic Cadillac Forum Discussion, 1975 deVille Climate Control problem in Past Cadillac Vehicle Discussion; After driving my deVille a few days, I turned it to economy the other day, started hearing a crackle then ...
  1. #1
    shwhitley's Avatar
    shwhitley is offline Cadillac Owners Member
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    1975 deVille Climate Control problem

    After driving my deVille a few days, I turned it to economy the other day, started hearing a crackle then smelled what sounded like wire burning so I shut the unit off. Now everytime I turn the system on, nothing...no blower, nada. I'm hoping it's a short...or a fuse...any suggestion of what I should look for first?

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    Re: 1975 deVille Climate Control problem

    Fried blower relay. On the same accessory relay block with the illuminated entry relay next to the main fuse block up under the IP over the driver's foot well. Check your owners manual for exact placement in the array.

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    Re: 1975 deVille Climate Control problem

    Thank you so much! I will check that out!

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    Finally got it all fixed. Needed new blower motor control head and relay. Now it's working the way it's supposed to. Very glad!
    77CDV likes this.

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    Re: 1975 deVille Climate Control problem

    I spoke too soon...just had to purchase a programmer to go with the new climate control system so the fan would work. Just ordered it from Lord of Cadi...hope it works...

    on that subject, I have a used control head and will soon have a used programmer...anyone know who might restore these who would want to take them off my hands? I hate to let them go to waste (plus I could use the money lol!)

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    Re: 1975 deVille Climate Control problem

    Restorers are listed in Hemmings. Don't know if they buy cores to keep, but you can always ask.

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    Actually I need to find someone who can restore it so I can use it. When I put the programmer on it blew a wire (so my mechanic said) and now the controller isn't working. What should I be looking for to fix this bad boy once and for all?

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    Re: 1975 deVille Climate Control problem

    You mean the new replacement programmer shorted out? Sounds like an overvoltage problem. Those are a bitch to trace down.

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    Re: 1975 deVille Climate Control problem

    yeah, the replacement shorted out...don't know where to go next

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    Re: 1975 deVille Climate Control problem

    I'd find myself an AC shop that works on older cars and has experience with the Cadillac Climate Control system.

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    Re: 1975 deVille Climate Control problem

    Cadillactim.com restores stuff like that

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    Re: 1975 deVille Climate Control problem

    Thanks for the info everyone...it's still an ongoing issue with the AC system. Sometimes it blows, sometimes not, now sometimes the cold air will blow from the floor vents instead of the dash. Even with the new programmer. I'm just about to the point where I'm going to take it to somewhere that does this sort of thing and say fix it!! I will check out the place you suggested to have what I have already purchased restored. Luckily, though, the weather turned cooler today so the immediacy of AC has diminished a bit! lol I will keep you posted!

    ----------

    Quote Originally Posted by 77CDV View Post
    You mean the new replacement programmer shorted out? Sounds like an overvoltage problem. Those are a bitch to trace down.
    yeah the mechanic working on it thinks he's found the short, but while he was finding the short, it must have messed up the "new" parts I bought. Anyone know of a good AC mechanic in the Dallas/East TExas area?

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