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Old Yesterday, 10:58 PM   #3
eighteenninetytwo
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Join Date: Sep 2013
Location: Redwood city, CA
Posts: 693
Re: Heater control unit change out.

Sorry 1975 blazer. Will try to post pics tomorrow. I THINK i might have figured it out on the basis that the switch for on slow and max has variable positions whereas the hot wire from the fuse box is going to be hot and unchanging when ignition is on. I just need to get to NAPA tomorrow to get a new connector.
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