Full Re-Wiring Job - Help, Ideas & Sources needed.

Get a piece of plywood and some large finishing nails. Lay your existing harness on the plywood and trace around it with a pencil and then drive the finishing nails in the outline. It helps if you label where the wires end up (horn, lights etc.)

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With the harness on the board, remove the tape and then start replacing wires one at a time. If you plan it out, you can add wires or increase the size of any wires you want at this time.

Rewrap the harness with non-adhesive tape like this stuff. ELLIOTT ET501, 1" BLACK NONADHESIVE TAPE, HIGH TEMP VINYL WIRE HARNESS OEM FS | eBay

I've done a couple cars like this, including a 53 Windsor that I used cloth covered vinyl wire. The picture shown is from that car.

BTW, I've seen the plywood and nails method used for making new harnesses lots of things, like radar and sonar equipment.

While this place caters to older (pre 1959), they have a lot of supplies and sell wire by the foot. They also have a lot of assorted colors with and without the tracer stripes. Quality stuff too. Rhode Island Wiring Service Inc.

For relays, be sure to use the real Tyco/Bosch relays and not the cheap Chinese brands. Here's a good deal on them. https://www.amazon.com/gp/product/B000P61E36/?tag=joeychgo-20

Use sockets like these for the relays.

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