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Old 06-04-2014, 11:29 PM   #22
rich weyand
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Join Date: Apr 2014
Location: Bloomington Indiana
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Re: 1983 c20 blower only works on high

OK, give me a little more info. I'll have to track this back from your end since we're not matching the print I am looking at. Lessee if I can find the print that matches you instead.

It's a 77, right? Model number (K5, C20, etc)?

Does it have A/C?

What color is the wire coming out of the blower motor? Should only be one wire.

At the first place that connects -- relay, whatever you want to call it -- what are the colors of the other wires connected there?

Let's start with that. You may have one of the optional setups, which are slightly different.
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1978 K10 RCSB DD.
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