Wiring and horn problem on 66 c10

[Jmh2fb]

Hey all,

New member and heck of a mess on my hands. Got an old 66 c10. Wiring harness was partially fried (purple wire), blinkers didn't work and one brake light (driver's side) wouldn't light and horn unplugged. Purchased a new wiring harness and turn signal indicator, replaced blinker fuse and bulb. Good news is that I have blinkers, but still no brake light on driver side and when I plugged horn it blew constantly. Took turn signal switch back off with steering wheel of course and can only get horn to quit if I unplug horn or if I move steering column by pulling to side. (As a side when you hit brake lights with turn signal on turning right the left tail lights)

Any ideas? Multiple issues? Related? Help!