Question about 2001 Honda Civic

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A/C & power door locks not working

Did you ever get a solution to this problem with your Civic?

I had the same thing happen suddenly a few days back...A/C stopped blowing cold, and power door locks stopped working. Also, the "Brake" indicator light on my instrument cluster came on. I checked all the fuses...and swapped out the switches in the fusebox to see if maybe it was isolated to one of those. No luck.

Took it to a shop...they basically did the same thing, couldn't find a problem, but traced the wiring back to a shared part of the instrument cluster. Thinking I may have to replace the whole thing...sounds like big $$$$.

Thanks!

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  • juley97 Sep 07, 2008

    I have the same exact problem. I took it to a shop and they tried everything to try to fix the a/c but nothing worked. They tried a new switch in the dash, checked the relays, and check the compressor. All was found to work. They think it has to be electrical. When I called a local Honda dealership, they did not have a clue about how to fix it.

    If you find out how to fix it, I would love to hear it.

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Hi, This was the perfect solution to my problem!!! I go to my 01 Honda Civic a few days ago and my power locks weren't working ,my a/c wasn't blowing cold,my dome light wasn't coming on, and my brake indicator light wasn't going off. My husband spent half the night trying to figure out the problem, then we get on the internet and found this site ,so helpful. We called Honda the next day and ordered the multiplex control fuse box that goes under the steering column through my husband's work, it cost $120.00 wholesale and put it in the next day,problem solved!!!! This site is a great help,thanks so much and keep up the good work!!!

Posted on Sep 20, 2008

Hello---I posted the original request.  Turned out to be a failed "Multiplex Control" or "Multiplex Processor" unit (underneath the steering column), to the tune of around $600 (ouch).  This is a heavy, grey-colored unit that serves as a computer or electrical switchboard of sorts.  But...problem is solved.  

Posted on Sep 16, 2008

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Both of your problems are directed to an electrical problem, most likely the wiring harness is disconnected or even fried so replacing it might be choice, it shouldn't cost you much if you know a little about cars and how to fix them

Posted on Sep 16, 2008

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