Light Out warning? | MotorhomeFun | The Motorhome Support and Social Network

Light Out warning?

Nov 22, 2007
5,337
6,062
East Yorkshire
Funster No
900
MH
Rapido "A" Class, Mecedes
Exp
18+yrs plus 25+Towing
Hi

2009, Rapido On 3L V6 Auto, Sprinter Base. I have a "tail light" error on the dash comes up when I switch the side (and head) lights on. All the lamps check out as working, but the error light remains. I have consulted several Mercedes online "forums". And suggestions range from mismatched lamps, to wiring faults.

So far I have removed and replaced the lamp (standard twin filament 21/5 Pilot and Brake) despite the fact the O/E lamp was not actually faulty. I still have this issue.

It is annoying rather than anything else, as I know I have a full working light set from physically examining the M-H when lit. and I can switch the error off on the steering wheel by cancellation, (it returns next time I fire up).

Any one come across this before?. I suspect it MAY be an earth issue, but finding and cleaning "earthing" points is a long and tedious job. So before I go that route I wondered if anyone had had the issue and a solution.?

Pete

P.S. The only other time I have seen this was many years ago on a Merc; Truck!!.
 

BwB

LIFE MEMBER
Apr 3, 2011
836
860
Suffolk UK
Funster No
15,893
MH
PVC
Exp
Since 1990
Have you changed any of the bulbs for LED ones recently?
or
This sort of thing can be a bad earth. Take all the bulbs out, clean off the contacts (bulbs and sockets) and stick them all back in and try that.
 
Jan 28, 2008
6,452
7,136
walthamstow east london
Funster No
1,353
MH
renault burstner delphin
Exp
7 years campers before that
probably talking rubbish here but could you use a long fly lead with a croc clip to add a known good earth to each light cluster in turn to narrow it down

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Aug 6, 2013
8,641
7,797
Kendal, Cumbria
Funster No
27,352
MH
A Class
Exp
since 1999
The first earth point to examine is the connection common to all rear lights, or all rear lights on each side of the van. Check also for a failed numberplate light - easily missed.
 
OP
PeteH
Nov 22, 2007
5,337
6,062
East Yorkshire
Funster No
900
MH
Rapido "A" Class, Mecedes
Exp
18+yrs plus 25+Towing
Re-Check, this am, shows failed Number plate light Fitting. (Bad Earth). All fed from LH lighting!. I am certain it had been On when I last looked, But????. Repaired the fitting and now OK.

Whilst on this I found 3 of 5 High level brake lights out (tiny little bulbs) When I tried the replace them they broke in the fitting. Have bye passed the Existing lights, with 2 strips of LED`s. Works a treat!.

Thanks guys for input.(y)(y)(y)
 
Last edited:
Reactions: BwB
Oct 29, 2012
844
949
essex
Funster No
23,489
MH
Rapido 9090df
Exp
20 years (unless you count my dads VW which makes it 52 years with a few gaps!!)
that's why we love this forum , there is always someone to help(y)

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