I am working on our trailer with some gusto as the weather has turned for the best. Next up, the wiring. The previous wiring is pretty trashed. It looks like 12V system (the system connecting to the car?) ran under the trailer, then up through the back panel, after connecting to the exterior lights there; then a green wire runs up to the front exterior lights. However, the wires had been cut at some previous time. So basically, I am starting from scratch.
Is there a set wiring harness I can buy for this type of project?
I have seen the wiring diagram on this forum, but have no idea what to do with it. Is there a place I can buy the red, green, brown, etc wires?
Are there any blogs that have documented the whole process that I could look over?
I have done lots of electrical in the home, but not sure where to start with all of this.
I'll try to help. FIRST: THE GROUND IS THE MOST IMPORTANT WIRE IN A 12 VOLT SYSTEM. Most trailers use white for all grounds for 12 volt.
There is no wiring harness for a vintage trailer. You can use a 4 way flat ribbon from front to back, but the colors are not the same as the 7 way code. (which most Shastas used) Not difficult but keep the color codes in mind. (Shasta: Green=TM, Red=LT, Brown=RT)
12 volt tow wiring is basically separate from the 12 volt system inside the trailer. They do interact.
Buy automotive primary wire at any Auto parts store. Autozone is pretty reasonable. I use 14 ga.