I need some help from a wiring guru on a 66 convertible, standard interior. For my wiring, I was fortunate enough (note sarcasm) to have to replace the entire cowl assembly allowing perfect access to replace all the under dash wiring. Even though I have numerous wiring diagrams, I laid the new harness out and labeled, numbered and described location and color on each wire on the new harness as I removed the old wire from its original position.

Enough history, here is my dilemma. I have extra wires on the new harness that weren’t on my original harness and some I haven’t been able to identify because they weren’t originally used. Going through all the wiring diagrams I could find, I was able to identify some of them as a pair of wires for the FULL console and a fog lamp wire with an eye on the end. I have neither option on this Mustang so I used heat shrink to cap them off.

The wires I have left over are:

• Solid white wire coming out of harness with the fuse block. This isn’t the solid white jumper from the wiper switch. The solid white from the wiper switch originally went into a black with red stripe wire that had three female inputs. Should the white wiper jumper go to the solid white on the harness?

• Two wires joined into a right angle spade female Red with white stripe, Blue with white stripe
• Single wire with right angle spade female, white w\Red stripe
• Large rubber connector with four wires White w\Blue, Light green w\white stripe, White w\red stripe and lastly dark green.

I thought these were for the emergency flasher but the flasher and emergency flasher switch both go into a separate harness that wires between the main harness and loops to the cigarette lighter post for power. The one I’m most concerned with is the solid white wire next to the fuse block. The others I ***-u-me are for extra equipment that mine doesn’t come with stock. As I said, everything went back exactly as I took the old one off.

ANY help is much appreciated.

 

I did lots of research today and it turns out the wires at the end are definitely for the emergency switch. Ford changed to the spade connectors from the hard wired switch in March of 66 and mine was built Sep 65. Now all I have to do is purchase a later model switch and eliminate the original switch and harness that went to it.

The white wire is an updated method of wiring the pump. I found a better diagram in a 65 manual. Guess mine was wired in the middle of production transition.