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 $$$$.
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!!!
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.
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
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The first thing to do would be to hook up a factory or professional type scan tool an check for DTC'S - diagnostic trouble code's . This vehicle has very complex electronic's. Serial data communication network,class2 data bus . There are electronic modules inside the door's that control the lock's ,power window's , power mirror's . Your best bet ,take it to a qualified repair shop . Not a fuse problem , driver an passenger door module each have thier own power supply. Two circuit breakers ,PWR/WDO circuit breaker 30 amp. You could check DRVMDL 10amp fuse ,located in the rear fuse box , PASSMDL 10amp fuse rear fuse box , RRDR/MDL 10 amp fuse rear fuse box . Rear fuse box is under the back seat . None of the window's , lock's etc.. work from any door switch ?
I am guessing you have power windows. Happens to mine sometimes. Slam the door a couple to few times, see if that doesn't put the window back on "track". I mentioned this to the dealership a while back and they were going to charge about $90 to pop off the interior part of the door and put it back on track. They said it "builds up dirt". I actually also toggle the window switch a few times to see if it will move slightly and then do my door slam thing a couple to few times. I seem to get this problem when it rains. I hope it helps.
You may get lucky by spraying penetrating spray like WD-40 inside & all around the latch assembly on door. Use that little red nozzle to get around in behind as far as you can, as well as try to get it along back of sides as well. That will allow it to run down on linkage to locks etc & hopefully free things up & get them moving better. Once it's freed up again, give it a coat of white lithium spray grease and use tube same as you did with penetrating spray, to avoid/prolong repeat in near future. Let spray work a bit then start moving lock manually at first, then try using power after it feels easier, and then keep working both until power lock works good. Don't go crazy & overheat power lock motor, give it a few minutes after trying 5-10 times, before trying again.
There is a Plug between the door and engine bay, it accessible through the speaker hole, but it comes loose so all prongs are not connected, thats why it works partially. should be an easy push to get em working.
Hey .. i have a 99 civic also and i found my door doesnt lock unless u open the handel and then lock it and was talking to the shop and they told me things get gumed up inside and take it apart and clean it up with lub .. try that see if it works sounds like same problem