A4 B8 - Rear foglight problems.

[luckydog]

Hello all
I have been attempting to fit a towbar and electrics to a pals 2011 Audi A4 B8 using a bypass relay and everything is done except for a rear foglight issue at the car.
Upon switching the headlights 'ON' and selecting both front and rear foglights on, (push switches) the front lights come on with a healthy green light at the switch BUT, when selecting the rear fogs on, I get an amber light at the switch for a second or so, and the rears do not illuminate.
Can anybody throw some light on the subject (pun intended!)
Thanks

[Gunnark100]

delete