Trailer light problems on my ds5

[Popikmarik]

Hello to everyone, I have a big problem with my ds5.
4 days ago I connected a trailer to my car and after 20min was showing on dashboard the message: Service and trailer need to be repaired. I connect my Lexia to see what is happening and it’s showing the code b117e and u1f00.
I removed the trailer and it’s the same. Service on dashboard and I don’t know what to do. I have open the socket from the back, I cleaned, I checked the voltage and it’s ok. I checked all the fuses from the compartments. All seems to be ok, I connected another trailer and the light are working. I don’t know how to delete the message from the dashboard. I hope someone can tell me what I can do. Thank you

[Popikmarik]

This are the pictures

[Popikmarik]

Someone who can help me with advice please? 🥹

[GiveMeABreak]

The U1F00 fault means that the fault is not being recorded in the log.

Here's the other fault:

Fault Code:	B117E 16
Description of Fault:	Brake lamps, fog lamps and reversing lamps control circuits supply fault. Voltage power supply common to the functions less than 8V.
Conditions for Fault to clear:	Voltage power supply common to the functions higher than 10 V.
Downgrade Modes whilst Fault is active:	-
Symptoms:	The lamps cannot be activated Lamps insufficiently bright
Suspect Areas:	Fuse Electrical harness Upstream voltage level Connectors Trailer Fuse Box

[Popikmarik]

Thank you for the answer.
But I cannot found that fuse responsible for this issue.
I search under dashboard, on the engine and backside and I cannot found that fuse. I found on the back 2 modules in the left side but nothing else. I can delete the error but it’s appear again after I start the engine.

[GiveMeABreak]

You need to check the trailer fuse board. That is the black plastic board in the rear that all the towbar electrics connect to. That is what the BSR (trailer fuse board) is for. There should be fuses on the board for the electrics, but looking at the fittinf diagrams for the official kit, there may not be fuses on this version as it is generic:

Does this look like what you have fitted?

If it helps I can get you the fitting guide for this system. Also pop your VIN up, so I can check this is the one for your vehicle.

[Popikmarik]

You need to check the trailer fuse board. That is the black plastic board in the rear that all the towbar electrics connect to. That is what the BSR (trailer fuse board) is for. There should be fuses on the board for the electrics, but looking at the fittinf diagrams for the official kit, there may not be fuses on this version as it is generic:



Does this look like what you have fitted?

If it helps I can get you the fitting guide for this system. Also pop your VIN up, so I can check this is the one for your vehicle.

VF7**************[VIN obfuscated, can be read by forum staff] This is the VIN number.

I don’t know if is the same but is the original one from the factory. I found that plastic board, but is a screw on the edge and I don’t know how to remove it because is not so much space there.
I will try to remove that to see maybe I can found that fuse. Thank you

[Popikmarik]

I remove this and I don’t found any fuse here

[GiveMeABreak]

Ok, so have a look at the fitting guide here. It should help you work out where everything is wired back to and the fuses that may be in the BSI after fitting.

DS5 Trailer Unit Fitting Guide

[Popikmarik]

Ok, so have a look at the fitting guide here. It should help you work out where everything is wired back to and the fuses that may be in the BSI after fitting.

DS5 Trailer Unit Fitting Guide

I just want to say: I love you .
I found it, was under under under the first panel.
Thank you so much

[GiveMeABreak]

Great, glad it helped.