jss56, I'm in the middle of rewiring my 54 3100. I got the harness from classic trucks. The wires came all numbered and a sheet with directions of where the wires go.
I started with the headlights,(harness came with 3 prong plugs.) So I plugged the plug into the headlights,ran each bundle through the fender wall ( make sure you have rubber grommets )then to a 4 terminal block thats attached to inner fender. Once I did that I laid out the harness on the drivers side fire wall to grill. I had wires that attached to the terminal block on drivers side,and long wires that went around radiator over to other terminal block . When I ran those the harness laid out. The alternator wires were right there, then the wires for the tail lights and running lamps connected to the small fuse box on the engine side of the fire wall, horn wires were also there for the horn relay,the wires for the gas sending unit, tail lights just dropped down under the drivers side fire wall( to be attached to the rear lights. Doing that put the wires for the brake switch and the dimmer switch right where they needed to be. The rest of the harness I fed thru the firewall for under the dash. I connected my headlight switch, Ignition. Waiting for my new gauges to finish the job. I'm also putting a small 6 terminal fuse box in for my heater,radio,siren..and eventually electric wiper motor.
I've posted pics for you to check out atleast some of the wiring.
Again, this was painless and I'm no electrician.
Take a deep breath and enjoy the process.
Take care.. I'll help if I can.
http://i1091.photobucket.com/albums/i381/snipewarrior/P1010059.jpghttp://i1091.photobucket.com/albums/i381/snipewarrior/P1010057.jpg
