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Old 16-10-18, 07:44 PM   #1
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Default Re-occuring door lock problem

Hello everyone,

I've written about this problem last year, and although the problem sorted itself out during the summer, it's come up again....

As of a couple of weeks with a drop in temperature and a rise in humidity, the passenger lock of my '93 3-door 307 XSi doesn't always unlock with the key fob (unlocks 1-5 tries). If I use the dash button, the door unlocks/locks perfectly every time.

The local dealership just quoted the cost of a new lock, but I would like some of your input on this problem before I go change it.


Thanks!

Last edited by Loreto; 16-10-18 at 07:49 PM. Reason: Sorry, stupid mistake! :)
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Old 16-10-18, 07:45 PM   #2
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Batteries in Fobs or the battery holders in fob. Check them first.
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Old 16-10-18, 07:50 PM   #3
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Quote:
Originally Posted by madbadandold View Post
Batteries in Fobs or the battery holders in fob. Check them first.
Can this affect only 1 specific door lock? (drivers door and boot unlock/lock fine)
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Old 16-10-18, 08:05 PM   #4
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Sorry did not fully catch the gist of one lock. Perhaps try taking the door card off and lubricate the lock with WD40 and see if that helps.
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Old 17-10-18, 12:44 PM   #5
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What is the difference electrically between using the keyfob and using the dash button?
Try lubricant but I'd like to know the answer to the above because it would seem to me that they ought to be the same circuit just triggered from different places.
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Old 17-10-18, 06:28 PM   #6
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Are there different feeds to the lock I wonder?
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Old 18-10-18, 07:49 AM   #7
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Are there different feeds to the lock I wonder?
Could be. I was on a late shift so didn't have a chance to look at the haynes manual.
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Old 18-10-18, 11:57 AM   #8
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Thanks for all the info, I'll see if I can find the time to spray a bit of WD40 on the lock mechanism and see if that works.
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Old 22-11-18, 10:06 AM   #9
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Just wanted to follow up and close this thread (for future reference).

I tried oiling the lock with a bit of WD-40 but there was no change, and when I went on a short three day trip which had near freezing temperatures (around 3* C), the lock started to fail completely.

Ended up changing the unit yesterday which was around 150 (133) and so far everything's working fine.
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Old 22-11-18, 06:49 PM   #10
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Pity but at least it is sorted.
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