I have recently acquired this '87 Bronco II. The horn and cruise control do not work. I replaced the fuse but they still do not work. I believe it is the relay , which I have already purchased but cannot find it on the truck.
Does any one know where it is located?
Thanks

 

Welcome to FTE!!!

I'm not sure were the relay is but I have a link on the 1989 cruise system in the tech info post at the top of the forum.

 

I could be wrong on this, but it seems to me that the horn and cruise control share a common ground or wire or something like that in the steering column. Get that wiring diagram from Ken00 and check something like that out.

 

I'm looking at the wiring diagram for my 87 & fuse 16 supplies voltage to the cigarette lighter (is it working) and to the horn relay (in the steering column) The horn relay supplies voltage to the "on" cruise switch on the steering wheel thru a "voltage supply brush" Do you have voltage at the on swtch? If not the relay or the brush is shot. Fixing this would be very simple if you had the "electrical & vacuum troubleshooting manual" from www.helminc.com Or take KenOO up on his offer for the wiring diagram.

 

Thanks to all ,at least this gives me some place to start.

 

Good luck wth it, keep us posted on what you find.

 

if it was not the fuse, could be you have two problems. My 88 Bronco II had no cruse control when the valve above the brake pedal didn't close. It shuts down cruse when you step on the brake pedal. The horn bug could just be another electrical problem....