1976 F350 360. No reverse lights...?

 

Automatic or manual transmission?

Checked your fuses?

Owner-added trailer harness installed?

 

Auto, fuses checked seemed ok, no harness installed

 

Most of your posts are one line "why doesn't this work" statements, almost as if you immediately start a thread the instant there's an issue. What have you done yourself so far to understand the issue? What troubleshooting have you done? AKA, do you have power at the switch? Do you have power at the fuse panel?

 

Yes, telling us what you have done to figure it out helps...

See if this thread helps you:

https://www.ford-trucks.com/forums/1...itch-help.html

 

Check your electrical grounds. Had that issue on a different 77 F-150 that I had. Make sure the grounds are rust/corrosion free and another issue I found was wire insulation dry cracking. It is a tedious job going hand over hand tracing wiring and checking for broken insulation/wires ect. That is where I would start,... my two cents.