All, My rear fog light refuses to work. No 12Vto the light. There is a good fuse and the the rear fog switch brightens as you would expect when you press it ( doesn't when you remove the fuse). Is there a relay for it somewhere and if so where? Or I'm down to tracing wires from the switch
Sadly no conventional relay, but lots of components on the pcb, behind the dash. Certainly investigate the wiring first of all but it could well be the dreaded faulty pcb. As Salmo indicated, lots about it on the thread indicated.
To shorten the search and maybe make life easier for you, Thread #792200 of the above posting details what Rog did to fix his pcb by simply replacing a transistor. ((That was after he had replaced everything with his own designs)
So, if your fault is similar, it could save you having to replace the whole gubbins.