Reverse lights not working

Tiny
RAMZITH1
  • MEMBER
  • 1998 MERCEDES BENZ S320
  • 3.2L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 116,500 MILES
Hello,

The reverse lights not working at all. Checked the bulbs found okay, when releasing the gear to the reverse the light not coming up at all, checked the fuses found all okay in front and in the trunk beside I don't know if there is a fuse for the reverse lights.

Please help, thanks

RAMZI
Friday, April 9th, 2021 AT 8:56 PM

9 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,519 POSTS
The fuse that powers the lights and the reverse interlock is F3 which is a 15 amp fuse labeled 25. It looks like they are then fed through the lamp failure monitor based on an input signal from the transmission range sensor. Does the park interlock work? If you put the car in reverse does the starter still work? It shouldn't if the switch is working.

I would use a test light to verify that the fuse is good.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If it checks okay then you will need to access the transmission selector harness and see if the switch it sending power to the lamp module on the gray/yellow wire. That harness is under the center console connected to the transmission switch inside the shifter quadrant. Removing the trim over the shifter should let you gain access to the switch That process is in the last 5 images.

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Saturday, April 10th, 2021 AT 12:30 AM
Tiny
RAMZITH1
  • MEMBER
  • 70 POSTS
Hi, will check it and let you know. Thanks
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Saturday, April 10th, 2021 AT 5:08 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,519 POSTS
If you discover that there is power at the switch but still nothing at the lights then it could be in the lighting module. That is what the testing is to find, where the problem is.
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Saturday, April 10th, 2021 AT 10:25 AM
Tiny
RAMZITH1
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  • 70 POSTS
Acknowledged, thanks.
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Saturday, April 10th, 2021 AT 12:13 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,519 POSTS
Just thought I'd see if you had any luck or haven't had time to look at it yet.
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Monday, April 12th, 2021 AT 5:46 PM
Tiny
RAMZITH1
  • MEMBER
  • 70 POSTS
Thanks for the follow up, actually not yet looked at it, but soon will and let you know.
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Tuesday, April 13th, 2021 AT 3:21 AM
Tiny
RAMZITH1
  • MEMBER
  • 70 POSTS
Hi, still not yet looked at it, will do soon. Thanks
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Tuesday, April 20th, 2021 AT 1:05 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,519 POSTS
No rush, just like to keep track and maybe find answers.
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Tuesday, April 20th, 2021 AT 4:44 PM
Tiny
RAMZITH1
  • MEMBER
  • 70 POSTS
Okay, thanks.
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Wednesday, April 21st, 2021 AT 4:35 PM

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