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Trunk remote release not working

Tiny
RAMZITH1
  • MEMBER
  • 1998 MERCEDES BENZ S320
  • 3.2L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 116,000 MILES
Hi,

Since I got this car from my sister the remote trunk release won't work, both in the dash and the key remote.
Whenever I press the trunk release button in the dash it does not pop up the trunk. When I try the trunk release button in the key, nothing happens.
Remote Lock/unlock works though both in my 3 button key and dash button.

What i've tried so far is check the trunk release actuator and line from the actuator going the the rear seat pse pump. Everything is good no leaks.

I know it is not a big deal since you can just press the button in the trunk key slot to open the trunk but it just feels great when everything is working.


Thanks in advance.

Ramzi
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Monday, April 5th, 2021 AT 3:40 AM

5 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
The way to figure this out is to check voltage on the three wires at the switch. Two are power wires from each source of where it was pressed. Either the button on the key or the interior switch.

https://www.2carpros.com/articles/how-to-check-wiring

I attached the wiring diagram below but I suspect you have an issue with the actuator or the ground if neither of them work but let's just make sure you have voltage there and we can go from there.

Thanks
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Wednesday, April 7th, 2021 AT 7:02 AM
Tiny
RAMZITH1
  • MEMBER
  • 70 POSTS
Hello,
I will check it as instructed and let you know.
Thanks,
Ramzi
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Thursday, April 8th, 2021 AT 11:19 PM
Tiny
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Sounds great. Thanks for the update. We will wait to hear back.
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Friday, April 9th, 2021 AT 7:09 PM
Tiny
RAMZITH1
  • MEMBER
  • 70 POSTS
Hello,

Yes, the issue found with actuator, it was replaced before, the fixed one found missing a piece that pull up the trunk to open, dash switch and the remote are working fine, thanks for the help, appreciate it always.

RAMZI
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Friday, April 9th, 2021 AT 8:47 PM
Tiny
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  • MECHANIC
  • 18,907 POSTS
You are welcome. Thanks for the update. That will surely help others in the future. Please let us know if we can help in the future. Thanks
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Saturday, April 10th, 2021 AT 7:47 PM

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