Wiring for a Trailer (and a question on aux tank wire)

[colnago]

I was under the truck today, chasing down some mystery wires. There's a harness that used to go to a six-pole trailer plug, but it's been butchered beyond recognition, so I need to replace and rewire. If I'm only wiring for lights, is it better to splice into the truck wiring at the rear end, or run a new harness specific to the trailer, and splice into the system at the front?

On a second question, one of my mystery wires is white. I chased it to an aux gas tank sending unit. Are there standard colors for aux tanks, or is each truck different?

Joseph

[Lee]

Hi,

If the wiring is butchered as you stated it is,.... I would splice in at the butchered point thus cleaning it up at that location.

Splicing in up front does not cure the present problem in the rear.

Take care,
Lee

[colnago]

I got under the truck again today. What a train wreck! I started at the back end, and started working forward on the trailer harness. About three feet forward, it was spliced, and different colors were used at the rear. I figure that the only way is to rip it all out, and start fresh at the front end. At least it's not keeping me off the road, and I can take my time fixing this.

Joseph