Yes, I meant the light switch.
If the fuse blows immediately once the switch is turned on, there is a shorting somewhere. It could be a bare wire, maybe due to abrasion or some external impact.
This is not going to be easy unless you have any damage area which you can check first.
Try unplugging the wireharness to rear from fuse box to test and isolate it fron front.
Wednesday, March 4th, 2009 AT 7:13 AM