First, I always wear my seat belt....... I don't need to be reminded.
If I am backing up to hook the trailer, or just moving the truck in the driveway, it's a pain in the neck to hear back-up, seatbelt, parking brake chimes.
And even moving my truck, the parking braking is chiming, but I think it's the seatbelt, so I ignore it.
What is the best way to disable it? Or better yet,where is the chime?

 

Your owner’s manual explains how to turn it off.

 

I disabled mine because of the same reason. It's easy to do.

 

What I want is a turn signal still on chime! Can we rewire the seat belt, key, or headlight chime to do this?

Just a thought . . .

 

One of the first things I do on a new truck is to disable the chimes. To disable the door open/key in ignition chime, remove the ignition switch and tape over the small brass tab in the carrier. To remove the switch, insert a thin phillips screwdriver of a nailset in the small hole under the switch, and depress the plunger, turn the key and the whole assembly will come out. You will see the brass tab in the well.

 

When in need. Always check our tech folders. A wealth of info is available.

https://www.ford-trucks.com/forums/4...oor-chime.html