Ihave a 1979 ford F-250 4x4, replaced entire wire harness. while testing all the systems work but the horn. no power to the button on the steering column, horn is new and works already tested it. where does it get power to the button??? I have no power to the blue/whit wire going up the column?? anyone have any ideas??

 

Do you have cruise control? Horn wiring is different between cruise/non-cruise vehicles.
Non-cruise equipped trucks get their power from the headlight switch through a yellow wire that goes from the h/l switch to the horn pad. From there, there is a blue/yellow wire that goes from the horn pad to the horns. The blue/yellow wire won't show any power untill the horn pad is depressed.
If you have cruise, the horn works through a relay.

 

no speed control, wondering if I have a wirre out of place when I replaced the signal switch??power goes fron the light switch to the column via what wire??which is the power at the connection socket??

 

The yellow wire is the power wire. According to the wiring diagram there is only one solid yellow wire that comes from the headlight switch. Kinda hard to "explain" the location but on the diagram it's in the top row, left terminal. This wire goes to the gray "horseshoe" shaped connector at the steering column. The wire is in the "outside" row, the one with seven spaces. Two spaces on one end of the row are empty. The yellow wire is the first wire on the other end.

 

I need to figure out if the if I have e column plug wired up correctly. any photos of what it supposed to look like ??

 

Wiring information. https://www.ford-trucks.com/forums/1...chematics.html

 

Thanks Ranger. Tried to rep you again, but the $@%^!^! software won't let me.......again.

 

It's all good Mike. Took me a bit to find that thread so I figured I'd put it in my sig.