INTERIOR LIGHT ELECTRICAL PROBLEM CANT FIND THE SOURCE

[rrichard773]

areeet people im in a sticky situation atm
basicaly i keep blowing the 20 amp fuse that protects the interior lights cd player horn center date temp etc display and hazzard lights.
once the fuse has blown the date temp display will light up when head lights are on however as soon as i turn down the dimmer the lights will start flashing and when i turn the interior light on they turn of.

if i put a new fuse in its fine and all is well untill the interior light is turned on and the fuse blows instantly. however if the door is opend before the fuze blows there is some serious interferance picked up by the spakers


i get the same results with no bulb in and there are no visable shorts

if anyone could tell me what the problem could be or what wires to check for shorts that would be great
would like to know what wires on the back of the interior light switch match up to live and earth in the actual light holder so i can get a meter on them and see if it shows a short

cheeers