Caravan Socket Wiring

[oggie]

Hi All,

My caraven exterior lights when towing keep blowing a fuse on the Gal, on inspection who ever wired up the sockets connected the caravan exterior lights (black and brown) to the rear number plate lights, which is a 3 amp fuse and obviously not up to the job, question is looking at the wiring loom i cant figure out which wires go to the gal tail lamps to rewire.

Any one know what colour wires are for the tail lights on the Gal.

cheers

oggie