can't help about the signals, you obviously have some unknown aftermarket setup as the originals had no hazard function, but here's the factory signal wiring diagram, sounds like there might be some wires incorrect

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot