While trying sort out issues with the Parking Lights and Side Markers on my 12/70 Series 1, I discovered that the wiring harness that connects those parts is in really bad shape. Insulation is torn, wires and frayed, and one of the side markers does not have connector at all.

I took a look at the harness from my ’73 parts car, and it is in very good condition, but I’m not in a position to rewire the entire car at this time, which is what I would have to do since there are harness is a single run without a connector to simply switch out.

I am considering surgery by cutting harnesses on both the ’70 S1, and the ’73 parts car, where they come through the front radiator wall and add a weatherproof connector to mate the two.

I am also considering a “stop gap” repair by simply replacing the bad wires using solder.

What are your thoughts?

Hi Tony,

I've had to repair a few wiring harnesses. What I did was remove the plastic wrap back far enough to cut the wire in the harness. Then solder the replacement wire and re-wrap the harness. If there is a particular section of the harness that is damaged, then you could cut out the damaged wires and solder in new wire, then re-wrap it.

I tend to re-use the original, non-sticky "tape" to re-wrap the harnesses, with a small piece of electrical tape to tack it back together where I cut into it.