Technical Ducato rear fog lights fault

[beemer1970]

I have a LWB Hi-roof Ducato '15' 2.3 JTD 06 plate. Went to inspect it today ready for it's MoT tomorrow and the rear fog lights aren't working. I've checked the bulbs, fuse, relay and all is fine, so too is the switch on the dash in that the amber light is coming on. Tried the local Fiat dealership but they can't look at it til Monday.
CAN ANYONE SHED ANY LIGHT ON IT?

 

[PeterM]

2030 - FOG LIGHTS - Functional DescriptionHope the following helps.
See attachment for circuit diagram.


PeterM

all versions
In the presence of a side light signal, control panel H090 excites the coil of relay T17 housed in underfacia junction unit B001 when fog lamp activation is required. An earth signal is then sent to the fog lamps from pin 3 connector A of H090 to pin 6 connector C of the junction unit.

The relay coil receives an ignition-operated power supply (INT/A) and the line is protected by fuse F31 housed in underfacia control unit B002.
Relay T17 closes the internal circuit from pin 1 connector F to pin 1 connector C of engine bay junction unit B001. The line leads directly from battery control unit B099 - pin 1 connector A - and is protected by fuse F09, housed in engine bay junction unit B001.
Foglamps F015 and F016 receive power from underfacia junction unit B001, from pin1 connector C, and are both connected to earth C010.