88 F-150 Horn won't work
 

I have a 1988 f-150 5.0 liter when i press the horn on the steering
wheel all i hear is a click sounds like it is coming from under the dash.
any ideas?. Also can anyone tell me where the horn is in the engine compartment. Or does anyone have a diagram of the horn system.
Thanks

Horns are on the rad support/fender wells, thier not hard to find....Conecters inside the pad on your stearing wheel could be shot, get a new pad at a wrecker ( not sure if 1988 had air bag ) Fuse.....conecters on the horns...chaped wire grounding out...