Lighting power issue

[phlyer]

I've cross posted this from my OP in the tech section as after 3 weeks I've not had a flicker of interest....

Anyone got any ideas.  My 2L cdti has developed an issue that has the fog, reversing and rear right indicator lose power.  The Cambus keeps giving a bulb warning but the bulbs have all been checked and they are all good.  I've also checked the power tracks in the clusters from the cable socket pins to the bulb socket and they are OK too. 

This spreads across 3 of the 4 rear clusters and all the other lights not mentioned are OK.  Same time as this I believe, the dash power socket has also failed.  I've gone round all the fuses and they too are a ll good.

I'm guessing this means it's a wiring issue,  potentially a plug somewhere that's maybe come loose?  I don't really have a clue other to start checking connectors etc I can find. 

Any ideas on a common denominator?

Tia,

[phlyer]

To anyone who cares, result.  My trials over the circuit diagrams to find a common point all drew a  blank.  Anyway, auto elections went to work, they were initially as baffled as me, but they were able to take it to the next level.  

Turns out it was a short on the front power socket and the system had shut off the power to the lights.  Sorted the short out and everything started working again.