Ok, checked some stuff out...(this rv is new to me.) The previous owner had spliced a flood light on rear bumper to assist his backing up. But instead of wiring correctly, he just spliced it in series aft the left side rear light cluster. This effects functions to my trailer port, especially due to that flood light being burnt bulb which acted like a fuse to the circuit...duh! But thanks for all the help. I'll be sure to check in from time to time. Nice forum.