[ccclarke]

Here's a little trick I've used countless times to find shorts in fused circuits:

Since the fuse blows and you know you have a dead short, start by pulling the fuse and connect one side of the ohmeter to the shorted side (not power) of the fused circuit. Clip the other lead to a good ground and you should get 0 ohms or very low resistance (this verifies your shorted condition without having to use a fuse). If the ohmeter has a tone to verify ) ohms, start wiggling your wires in the lighting circuits, documenting everything as you progress. For interior lighting shorts, look carefully around the door switches and wiring of the harness where it goes between the door and car for signs of chaffing. Cycle the doors while watching the ohmeter, etc. Keep at it until you isolate the short. The ohmeter is a great tool, but your eyes may find it just as easily! Good luck!
CC