I'm looking at a 66 wiring diagram and if I'm reading it right the tail light wiring is black on one wire and orange/blue on the other wire on the passenger side and on the drivers side it looks like black and green/orange. Don't know if the colors are the same as a 65 but I kind of expect they would be. Wire size isn't listed. CJ Pony has wiring diagram manuals for $4.95. I havn't started rewiring yet but this will come in handy when I do. Hope this helps.
Thanks, Mike. I also have a '66 wiring diagram from a previous Mustang...man I wish I still had it (sigh).
At the present time all the Mustangs in my families stable are '65s, I guess I should just order one with the next parts order.
I just rewired my 65 using the harness from Painless. It is the same for 64, 65, & 66. The only difference I noticed was that the pre 66s only had a single indicator on the dash for turn signals while the 66 had one for each direction.
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!