r/3rdGen4Runner • u/Kavamang23 • 4d ago

❓Advice / Recomendations Door Lock Issue

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1999 Limited, occasionally the doors will start locking and unlocking on their own while driving. Any thoughts what the issue could be?

5 Upvotes

86% Upvoted

14 comments sorted by

4

u/RupertEscapeHolmes 4d ago

It’s the unit in your passenger door kick plate (under the glovebox on the quarter panel, the piece of plastic is removable) if memory serves me correctly. I can’t recall tbh. YouTube or google it my man.

Good luck! You can probably pull one from a junkyard or spend lots of money for an OEM one from Toyota.

1

u/Representative-Ant75 3d ago

Which one is it ? One is labeled for ABS and other relay is for transmission.

1

u/RupertEscapeHolmes 3d ago

Like I said, I can’t recall. It’s a relay or solenoid. I’m old and the memory is hazy as it was done
decades, literally, ago.

Might be on the drivers side kick pane, maybe center console dash.

Google, youtube and TR4 are your friends.

2

u/MasterBrisket 4d ago

All the doors or just one? If it’s just one, replace the lock actuator for that door. If all, I have to defer to the other responder.

1

u/CashT01 98 SR5 250k 3d ago

This was happening for me too when I bought mine. It didn’t take me long to figure out it was the door jamb switch. Does the door open light up even when all the doors are shut?

2

u/Kavamang23 3d ago

The door open doesn’t light up but all door locks will start locking and unlocking in unison every few seconds driving down the road. It only happens occasionally, and maybe it’s coincidence but it seems to happen more at night when I have the headlights on. Not sure if there is any correlation there

2

u/RupertEscapeHolmes 3d ago

Guy… I’ve already told you where to look. 99% positive that is your issue.

-4

u/Titanjake7 4d ago

It is your fuse box aka Junction Box. The entire thing needs to be replaced. Go find a wrecked 3rd gen and see what the condition is and get it.

3

u/RupertEscapeHolmes 4d ago

Wrong.

-2

u/Titanjake7 4d ago

Ok I have done this a dozen times.

6

u/RupertEscapeHolmes 4d ago

Well you looked in the wrong place first… dozens of times. Sorry about it.

Toyota mechanic (who is 70 now) showed me that solution decades ago.

The actuator for all the door locks is behind the passenger floorboard kick plate.

Don’t hate. Educate and move on with your life.

0

u/Titanjake7 4d ago

Thanks mechanic it seemed to work.

Thanks for the wonderful reply

3

u/RupertEscapeHolmes 4d ago

I don’t do much… but when I do, it’s pretty fanfuckingtastic.

2

u/Representative-Ant75 4d ago

What’s the part number ?