W124 - number plate lights earth

tpv01 · 14-07-2008, 11:31 AM

my number plate lights dont work and before i get pulled and get a producer i better fix them.

the bulb is fine as is the power, switch and fuse. However it doesnt have the permenant earth it should do. i have followed the earth wire out of boot and i disapears behind the rear seats. Where should it go? could i just earth is at a suitable location rather than chasing it round the car?

NW_Merc · 14-07-2008, 11:49 AM

Does the light in the boot come on? If not then it might be that the wires are freyed from opening and closing the boot and hence need soldering together. My car failed its MOT because of this and I was guided by a fellow member to the problem which was a straightforward fix.

tpv01 · 14-07-2008, 12:45 PM

just been to check and you are right the boot light doesnt work. please help.

crammy69 · 14-07-2008, 04:15 PM

Sounds like my issue, what you need to do is trip off the cable protector and find where the earth is broken. With mine I found it was (weirdly) at the point after it leaves the boot hinge under the rear shelf. Find the break, insert a bullet /crimped type connecter and shuld be good to go.

14-07-2008, 11:31 AM	#1
tpv01 Hardcore MB Enthusiast Join Date: Jul 2008 Posts: 170	W124 - number plate lights earth my number plate lights dont work and before i get pulled and get a producer i better fix them. the bulb is fine as is the power, switch and fuse. However it doesnt have the permenant earth it should do. i have followed the earth wire out of boot and i disapears behind the rear seats. Where should it go? could i just earth is at a suitable location rather than chasing it round the car?

14-07-2008, 11:49 AM	#2
NW_Merc Hardcore MB Enthusiast Join Date: Sep 2005 Location: Somewhere in Merseyside Car: 1994 Mercedes C180 classic Posts: 3,920	Does the light in the boot come on? If not then it might be that the wires are freyed from opening and closing the boot and hence need soldering together. My car failed its MOT because of this and I was guided by a fellow member to the problem which was a straightforward fix.

14-07-2008, 12:45 PM	#3
tpv01 Hardcore MB Enthusiast Threadstarter Join Date: Jul 2008 Posts: 170	just been to check and you are right the boot light doesnt work. please help.

14-07-2008, 04:15 PM	#4
crammy69 Hardcore MB Enthusiast Join Date: Feb 2008 Location: Sidcup,Kent Car: 2001 W210 E55 AMG,2010 Fiat 500 1.2 Lounge,2009 Jinlun Texan 125-11,2010 LML Star 125 DLX,2001 C90 Posts: 867	Sounds like my issue, what you need to do is trip off the cable protector and find where the earth is broken. With mine I found it was (weirdly) at the point after it leaves the boot hinge under the rear shelf. Find the break, insert a bullet /crimped type connecter and shuld be good to go.

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