LJMfabrication

Hey just wondering if anyone has had any problems with the door wiring harness almost burning down your car. I replaced my window motor and switch and it worked fine for months and then i came to my car one day and it was full of smoke. The door harness had melted and was arching two wires together. The fuse didn't even pop. I am a experienced tech and i have never had so many problems diagnosing a bad electric window. If you have had this problem or have advise it would be greatly appreciated.