I finally cleaned all the garbage from behind the seat of my '87 5.0 F150. Lo and behold i found two loose wires, The one screwed into the seat looks to be a ground strap, but i have no clue to what the other wire is for. I followed it under the carpet to the drivers side rocker panel (then discovered i have bad floor pans ) up to the hood latch but lost it there. One is black & the other is brown with a blueish-purple stripe. ANy idea as to what these are for?

 

seatbelt light?

 

yeah i think my cable hanging behind my seat is somehow broken, cuz my seatbelt light never comes on

 

maybe for an old stereo amp or something that was in the truck tucked behind the seat?

 

Tried that, wired a speaker to them to see if i got any sound, nothin. I also took my dome light out & swapped it, theres a brown & purple stripe wire going to that too.

 

It's for the seatbelt dude. If your seatbelt doesn't have two wires to it then that's where it goes.