96 Explorer-blows fuse when shifted into reverse

[mjt73]

Hey Everyone, got a strange problem. Everytime i shift my 4.0 liter '96 XLT into reverse, it blows the 10 amp fuse that controls the 4x4, rear defrost, and reverse lights. If I replace the fuse, everything works perfectly as long as I don't shift it into reverse. I've been underneath looking for chaffed wires but to no avail. Anyone have this same problem? Any help is greatly appreciated as winter is fast approaching.
Mark

 

[Tony H]

Yeah, it does Sound like a wire from your back-up lights is shorting out to chassis. Look right up by the trani. That would be my guess.

 

[mjt73]

I pulled both reverse bulbs out last night and tried it again and as soon as I put it in reverse, the fuse still snapped instantly. So I know it's not the light wires. Thanks for the input. I'll check around up there, hopefully tonight.
Mark