Welcome..It would be most helpful if we knew the specific issue you are having..

Sam

 

Need wire diagram/schematic for wiring colors and as to what each color wire is for. Thank you. Working on a 66 chevy truck and adapting a 76 chevy tilt column

 

An Ohm meter is your friend. I've never found an accurate schematic concerning wire colors.
I always end up "ringing it out" with an ohm meter.
But usually the two blues are front turn signal, and the greens are rear brake/turn, I think white comes from the brake switch, and orange goes to the brake switch, then you'll have two, or three to flasher, and one hot lead, and black may be the horn.
The dash indicator is drawn from the front turn signal wires.
Like I said, an ohm meter is your friend, and can tell you what is what, especially if you have the switch out, and in your hand.
Start off by process of elimination, the horn wire will be obvious, as will the 4 turn signal wires. Then by looking at the wires and contacts, you can determine the main "hot" lead. Then all you have left is brake switch and flasher wires to get sussed. that's where the ohm meter comes in.
Just remember, the brake lights, and rear turn signals run down the same wire. The turn signal operates by breaking the circuit every second or two on the wire selected by the switch.
Between a 66 and 76 the colors are similar, not Identical, but similar. You can also use the 66 switch in the 76 column, but you won't have hazard flasher. (if the column came from a van, without ignition on the column)

I hope I've helped, and not muddled it up.

 

Not the exact years you were looking for but they may help

 

Summit has this documentation, but you still to to verify with an ohm meter and match the colors.
https://static.summitracing.com/global/images/instructions/sum-890001 rev 12-19-11.pdf

Bruce

Bruce

 

GM colors

Older gm used the same colors for different circuits but they were different gages of wires. I had electrical for a while when I worked as an engineer at Ford. We used to say GM engineers probably only got an 8 color crayon box when they were a kid. Ford used a lot of base colors with a different color stripe. and were easier to trouble shoot an older fore wiring.

 

Older gm used the same colors for different circuits but they were different gages of wires. I had electrical for a while when I worked as an engineer at Ford. We used to say GM engineers probably only got an 8 color crayon box when they were a kid. Ford used a lot of base colors with a different color stripe. and were easier to trouble shoot an older fore wiring.

I used a GM style aftermarket harness in my Ford, so I had to match up the column wires first, good luck since the stripes were all washed out. I did it 1 by 1, hook up a meter to the wire, turn the left signal on and find the wire and so on. Then I made my own wiring diagram, pinned the connectors accordingly. The harness was the standard GM code, so it went pretty quickly.

 

Ford Wiring

A lot of the wire Ford used in the engine compartment did not hae high enough temp rating and the insulation eventually got brittle, some of the trucks used rubber base insulation instead of plastic that lasts longer. My 6 wheel trailer that I haul my backhoe on came with Ford color wiring, almost all the aftermarket hotrodwiring kits us GM colors.

 

wiring chart

When I rewired the 36 Pontiac sedan I added turn signals and Indian motorcycle Indianhead fender lights on the front fender, and a 53 chevy truck 6 V generator to replace the old 3 brush Pontiac. I used the ez instructions'.
http://www.goindesign.com/w4r/EZ2Wire-Manual.pdf