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Help with turn signal/brake light connections at the column

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Old 11-15-2015, 01:58 PM
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Help with turn signal/brake light connections at the column

I've tried searching this but can't find anything that lists the same color wires that I have coming out of a 76 truck column (automatic shift on the column) I swapped into my 66 when I converted it to power steering. The truck has been recently re-wired front to back with an EZ-Wiring harness where every wire is labeled, so my problem is not with matching up to the correct wires on the harness side, just needing to know what colors are what coming out of the column. Here is a list of the colors I have (second color = stripe) and how I have them connected. The way it is now every thing works except I only get brake light on the right side and it doesn't work if the right turn signal is on. I spent most of the afternoon yesterday trying various combinations but it seems like there are too many possibilities with some connections working for one thing but preventing something else from working correctly. Also I'm not using the hazard lights wire on the harness and horn wire hooked up else where. Please help, wiring is my nemesis.

Column side Harness side
White/blue to right front signal + right indicator
Green/black to left front signal + left indicator
Green to right rear turn
Green/white to left rear turn
Red/black to stop switch
Blue to Turn flasher
Blue/yellow not used
White/red not used
Blue/red not used
 
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Old 11-15-2015, 03:40 PM
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There is a link in the Tech Info Compilation for 73-79 wiring diagrams. Go to the electrical section...

As an example, this is page 4 of 9... the diagram you need is on page 5 of 9. Yes, I am requiring you to actually use the link so you know what is in there....

 
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Old 11-15-2015, 04:25 PM
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Hi!
I did this today but I didn't have the exact same colours as yours on my -77. I used the excellent "stop and turn lamp diagnosis" here at the forum.
The stop lamps are suppose not to work on left side when turning left. When turning left a circuit from the flasher "take over" from the circuit from the stop light switch near the brake pedal. I had this colors. Some are the same as yours but not all of them. Try Green/White to front left.
Blue/yellow stripe: horn.
Blue: +12V power from turn flasher for turn signals
Black/red stripe: +12V power from stop lamp switch for stop lamps
Green: Rear right turn/stop lamp
White/Blue stripe: Front right turn lamp
Yellow/black stripe: Rear left turn/stop lamp
Green/white stripe: Front left turn lamp
 
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Old 11-16-2015, 03:46 AM
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I'll post my results later (when I get my notes from my shop). I wired my 1973 Bronco column yesterday. I have the Centech harness and I ended up having to make myself a drawing of turn signal switch so I could figure it out. Two wires feed the middle contacts of the switch. Then four (two pairs) feed the two ends of the switch. Then two supply the horn button.

When you turn right, power feeds each end of the turn signal switch contacts. The front turn and rear turn contacts are at opposite ends of the switch and opposite sides of the switch. Hard to explain, but I will scan a drawing later if you still need it.
 
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