Tessoro 481 reversing light comes on with rear foglight (but not when reverse selected) (1 Viewer)

[NewToMoHo2022]

Took our 2019 Tessoro 481 for its first MOT and it failed because the reversing light doesn't work when reverse gear is selected. However, it turns out that it does illuminate when the rear fog lamp is switched on ! Has anyone else had this problem ? Alternatively, can anyone advise on how the diagonal LED reversing light is held in place ? Just wondering whether I can simply pull it out . . . . .

 

[pappajohn]

Bad earth on either of the two lights but most likely on the reverse light.........it's earthing via the other bulbs earth.
probably corrosion on the connectors

 

[Old Gibber]

Check the connection box for the rear lights under the back of the van, its probably full of water.

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[NewToMoHo2022]

Thanks pappajohn and Old Gibber for prompt responses - I'll get under the van again and try and pursue both those trains of thought...

 

[NewToMoHo2022]

Well, just in case anyone ever has the same problem in the future - I did check the connection box for the rear lights under the back of the van, but no water and all seemed secure. The earths looked OK too, so - with the aid of a wiring diagram helpfully supplied by the Benimar technical desk - I followed the coloured wires to the back of the LED reversing lamp strip and found that the grey "Antiniebla" (fog light) wire was connected instead of the violet "Marcha atrás" (reversing light) wire. Connecting the violet wire to the lamp cured the problem !

 

[gpat]

PDI must have been very thorough.

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[NewToMoHo2022]

Well, it couldn't possibly be a shortcoming in the PDI. I know that because the dealership told us "Well, it wouldn't have left us like that" !

 

[denisejoe]

Check connection on back of light there may be another wire in there that is the reversing lamp wire had it on a caravan the only difference between uk and lhd wiring at the back are reverse and fog wiring

 

[Northernraider]

It sounds like it was set up for continental use rather than uk .
Usually its one of the things that need changed as foglight is on the wrong side

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[Northernraider]

Check connection on back of light there may be another wire in there that is the reversing lamp wire had it on a caravan the only difference between uk and lhd wiring at the back are reverse and fog wiring

Posted at same time but similar thoughts

 

[pappajohn]

Well, it couldn't possibly be a shortcoming in the PDI. I know that because the dealership told us "Well, it wouldn't have left us like that" !

With that attitude Id be surprised if they even checked the lights.....cos, they must have worked when it left the factory.....didn't they!!!!

 

[DandG5515]

Had a friend with a similar problem with hymer a class, on first mot the fog light was found to be on the wrong side.

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[nicholsong]

Well, it couldn't possibly be a shortcoming in the PDI. I know that because the dealership told us "Well, it wouldn't have left us like that" !

So what were they implying? - that you swapped the wiring so that it failed the MOT?

 

[CaptHaddok]

Just found this site, thought I'd give a heads up on reversing/fog lights.
I had rear bumper replaced on my 481(don't get into this situation as it's over a thousand quid).
Went on a trip to Dartmouth on way home big loss of power - AA ford recovery came and engineer tested and changed an injector. He also did an engine and lights test which gave same results as original post.
Took back to distributors and they fixed problem.
I now think it was always wired that way and wires were re-replaced on repair.

 

[Reallyretired]

Both of my last two motorhomes have had two rear foglights and two reversing lights (French and German), my car has two reversing lights and one rear foglight in the middle. Seems a bit penny pinching to only fit one of each when most people use motorhomes in the UK (even if like us it's only to drive to the tunnel) and in Europe.

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