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Old 07-02-2013, 02:23 AM
Registered User
Join Date: May 2005
Posts: 12
2003 S500 turn signal doesn't work

The left rear signal doesn't work. I check the bulb and it is OK . I changed the bulb anyway and still doesn't work. I swap the socket from left to right and the socket work fine.Front signal work OK. I check the contact at the socket and it looks fine. Please help. Is there signal flasher? Does to whole tailight wiring ba. I try to move it around just in case the contact got loose but still not work.

It is for 2003 S500.

Thank you

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Old 07-03-2013, 12:00 PM
Registered User
Join Date: Jun 2013
Location: PNW
Posts: 242
For that I would get the factory electrical diagrams and troubleshoot the problem with a multimeter.

If you don't know how to do that, then take it to someone who can do that for you.
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Old 07-03-2013, 12:05 PM
Senior Member
Join Date: Sep 2002
Posts: 3,040
Look closely at the the contact points on the socket and the bulb housing. Overheated, melted, deformed contacts are common.

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