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Old 06-21-2019, 07:02 PM   #1
Tyson
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2002 L-Series 3.0L Sedan
Default Doors unlocking going over bumps or dips

I have a 2002 l300. For the past two months my door have been unlocking after going over bumps or dips in the road. I changed out the ignition cylinder lock. And it's still doing it. Does anyone have an idea of what is going on?

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Old 06-21-2019, 07:09 PM   #2
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Default Re: Doors unlocking going over bumps or dips

Flaky/worn/dirty door lock switches? If you can, pop the main switch, driver's side and disconnect it from its wiring harness. Drive over similar bumps. If the problem goes away, the switch is worn. If the problem continues then its likely a bcm or associated connections creating intermittent commands to unlock.

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Old 06-21-2019, 07:11 PM   #3
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Default Re: Doors unlocking going over bumps or dips

Ok thank you. So when you say associated you mean it would have to do with the BCM?

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Old 06-21-2019, 07:23 PM   #4
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Default Re: Doors unlocking going over bumps or dips

There are many parts to our cars electrical and electronic systems. The body control module does almost everything the ecm (engine computer) doesn't control. Door locks are part of the bcm and wiring/connections are part of diagnosing problems. With uncommanded door locks cycling, my guess is this isn't bcm related or wiring to/from the bcm. Initial guess is the main driver's side door lock switch and disconnecting it a first try to isolate this problem before moving on.

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Old 06-21-2019, 07:25 PM   #5
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Default Re: Doors unlocking going over bumps or dips

Yeah because this car runs great. This is the only problem I have electricly. So I'll unhook and go from there. Thank you

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Old 06-29-2019, 02:51 PM   #6
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Default Re: Doors unlocking going over bumps or dips

I took out door lock switch. Sure enough thatís what was wrong.

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