1974 auto turn switch into 1968 column

[DonH]

1974 auto turn switch into a 1986 column almost does not fit. As with anything else if you put enough effort it may work. After drilling, sawing, carving and many choice words it did go back with two of the three screws that hold it in place. I did hook up the 68 column wires a few months ago with a little help from here. The nine wires from this switch seems to be larger but were forced down the small space for them to fit in the steering column. Now that it is installed there is a lot of difference in the wire color codes.
Here is a list of the colored wires:
Blue- and that should go to the turn flasher.
Green\white- to LF turn.
White\blue- to hazard flasher.
Green\black- ?
Blue\yellow- ?
Yellow \brown- wire goes to the horn contact ?
White\orange- ?
Red\black- ?
Blue \red- This wire goes to the base of the indicator light for the shifter.

I have diagrams for other years and none for the 74 auto column.
I got the switch on eBay and they said it was a 74 and it fits a 66-77, NO WAY.
I hope someone has a diagram that tells me what the color code is.
Don

 

[DirtDonk]

I've run into three different discrepancies all with just '73 factory switches!
It must be that 73/74 transition thing going on.

I don't have my chart handy, but from what I remember (so don't hold me to it. Wait until Viper or Steve show up) I would say the horn relay is one of the issues here.

Here is a list of the colored wires:
Blue- and that should go to the turn flasher.
Green\white- to LF turn.
White\blue- Right front TS
Green\black- Should be to the Right Rear stop/turn lamp
Blue\yellow- From Horn Relay
Yellow \brown- Probably a black faded black stripe. Should go to left rear Stop/Turn lamp.
White\orange- ?
Red\black- From the Brake Light switch at the pedal
Blue \red- This wire goes to the base of the indicator light for the shifter.

Just throwing those out there. I'll browse through the books I have and see what's up. In the meantime, search for Steve83's SuperMotors links to see if his year-specific diagrams show what you need.

Paul

 

[DirtDonk]

I should have verified this first. The hazard switch is integrated to the turn signal switch now, correct? Or is it still just a plain old TS switch by itself?
I'm guessing yes, it has the hazard switch, but it does make a difference.

The Green w/black wire is a bit odd. Supposedly the right rear turn signal/brake light is Green only. No stripe. But it's the only Green left, so is likely the right rear turn/stop lamp

Paul

 

[DonH]

There is only one horn contact pin on this switch and it has the Yellow\brown wire connected to the bottom of it so it can not go to the left rear Stop/Turn lamp. With only one contact pin for the horn to work it must take the hot wire from the relay to ground?
I will try to get a couple of pictures.

 

[DirtDonk]

Hmm, well I guess that takes care of that then.
Funny, I don't know if you noticed in my first reply before I edited it, but I had listed that one as "probably for the horn" as well as the Blue w/yellow. But after looking at the diagrams in my old Chilton's book, I figured it was just for the lights.

So, with that, I wonder just which one would handle the Right Rear duties?
Maybe the Blue w/yellow that I have for the horn? Maybe they've got them bass-ackwards or something.
Pics would be good.

Good luck.

Paul

 

[DonH]

Thanks Paul for the good luck.
the switch is installed and the wires are hard to photo.

 

[Viperwolf1]

Piece of cake.

 

[DonH]

Piece of cake.

Looks like enough info to get to work. Thank you again. Don

 

[DonH]

Thanks to Viperwolf here the a color code for the wires from a 74 auto tranny turn switch:

Blue- 12v pulse from flasher
Green\white- Left Front Turn Light
White\blue- Right Front Turn Light
Yellow\black- Left Rear Turn/Stop Light
Green- Right Rear Turn/Stop Light
Blue\yellow- Horn Relay Ground Trigger
White\red- 12v Pulse from Hazard Flasher
Red\black- Stop Light Switch
Blue \red- Instrument Light and not used in my 68 column

Every thing seems to work OK. I still have to see if my 68 steering wheel is going to work with the single contact for the horn switch. I think I will have to fashion a ground connection on one of the wheel contacts. The flashers are now working on the column. The only problem is the brake switch. When I short across it the Stop Lights works OK. Maybe I put it together wrong or the switch is bad and should be easy to repair.
This seems to be a nice upgrade but a lot more work than I had expected but what is new. Thanks to this site and the people here I got her going one more time as she should.
BTW I am using the stick column with the C4 if interested.
Don

 

[DirtDonk]

Cool. Now I can return the switches I "borrowed" from work!
I brought home all three types to see how much work it would be to retrofit the new into an older column.
Looks like you did all the hard work. Thanks. ;D

I thought it would be the physical fitting though. Never thought the wiring would be so troublesome.

Paul