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Old 02-22-2024, 10:35 AM #1
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Unhappy power door locks operate by themselves

1999 sr5 v6 my power door locks have a mind of their own. They operate by themselves while driving or even when stopped and trying to lock or unlock the door. Any idea's ? is there a separate relay/ fuse for door locks only?

Help please
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Old 02-22-2024, 11:13 AM #2
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First thing to check would be the door jamb wiring, looking for cracked insulation and frayed wiring. Second would be the power door lock switches themselves.

There is a fuse for the power locks, but it is also used by a variety of other devices as well: Fuse Box Diagram Toyota 4Runner (N180; 1995-2002)
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Power back window, back door lock, back window wiper, open door warning (back door), power door lock control system, back window defogger, horns, theft deterrent system
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Old 02-22-2024, 12:45 PM #3
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If any of my doors are not closed fully, then the door locks lock and unlock randomly.
I'm guessing they are activating the switch in the door jam as I go over little bumps.
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Old 02-22-2024, 02:56 PM #4
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I had this same issue, I'm sure it's something else, but I'll toss this out anyway.

Mine came to a head when I hopped out of the truck and it locked the doors behind me, and cost me $150 for a lock smith since LUCKILY, I had my phone in my pocket, rather than in the truck....


Got an electrical aftermarket accessories?

I had an alarm system that also had a kill switch so the truck won't respond if someone broke in and hotwired it.

Removed that, after noting the problem went away after I disconnected it's power supply. 6 or 7 years gone now? No problems.

A short somewhere would be my guess, but I'm not smart, and I'm lazy, so ripping it out was faster and easier once it seemed to help with the problem.
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Old 02-22-2024, 03:48 PM #5
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I had a similar issue earlier this year that while driving my doors would randomly unlock. Since I'm mostly driving by myself, I figured the issue was either the drivers door switch or a faulty ground. In my case, I just removed the screws from the switch, examined them and then screwed them back in. Shockenly that worked. Haven't had any issues since

Good luck as electrical stuff can be a PITA

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Old 02-22-2024, 10:05 PM #6
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I had this issue also and I think it was because it was raining and water got into the door panel switch and was causing it to lock for me. A day or 2 later after it dried out it stopped and hasn't happened since.
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