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-   -   ACC Climate control retrofit question (http://www.peachparts.com/shopforum/diesel-discussion/199472-acc-climate-control-retrofit-question.html)

bigbillyboy 09-10-2007 01:33 PM

ACC Climate control retrofit question
 
I am tired of patching together my automatic climate control on my '85 300D, so I tore it out and am trying to replace it with the manual climate controls from a '90's GMC. I have two questions:

1. with the climate control unit removed, what wires control the blower motor? I assume that there is a "power in" to the Control unit, and the three or four different wires out that control the different fan speeds.

2. What wires control the A/C compressor? again, I assume one "hot" wire in and one wire out to the A/C clutch.

any help would be appreciated.

bigbillyboy 09-12-2007 07:39 PM

anyone?
 
Anyone?

KAdams4458 09-12-2007 10:31 PM

Don't get discouraged. This may too far out for most people to feel comfortable answering.

I've not worked on this part of a Merc before, but cars generally all have a blower motor resistor. A wiring schematic for the climate control would help a lot. Try to find one if you can.

As for the specifics of the compressor, I can only tell you that on my '77 300D, there are three wires to the compressor switch. I know... I thought it was odd, too.

I haven't dug in to the climate control issues with my car yet, so I can't offer much insight regarding specifics. Besides, our cars may be completely different in so many ways. I do have electronics knowledge, though. Like I said, try to find wiring schematics. A few of us here could help you figure it out with those, myself included.

bigbillyboy 09-13-2007 01:00 PM

thanks
 
I'll dig up a wiring diagram and dig into the dash. I was hoping there would be some info available before I dug into the dash. I'll keep you posted.

mj_sid 09-13-2007 03:04 PM

Quote:

Originally Posted by bigbillyboy (Post 1618777)
I'll dig up a wiring diagram and dig into the dash. I was hoping there would be some info available before I dug into the dash. I'll keep you posted.

Hey BigBillyBoy,
I would be interested in knowing how this turns out. Please keep us posted.

--Matt

bigbillyboy 09-13-2007 03:07 PM

will do.
 
I just wish that the manual controls from a 240 were more available...that would seem to be easy enough.

KAdams4458 09-13-2007 03:08 PM

Quote:

Originally Posted by bigbillyboy (Post 1618777)
I'll dig up a wiring diagram and dig into the dash. I was hoping there would be some info available before I dug into the dash. I'll keep you posted.


Yeah, I know that feeling. I don't know how many times I've spent figuring out things on my own, but this forum has still been a fantastic time saver.


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