So I had an issue with my high beams not staying on, replaced the head light switch now they stay on however another issue remained. I turn the radio on, pull the headlight switch all the way out, head unit resets off then back on, then if I twist the dimmer to 3/4 of the way the head unit resets again. So weird! I didn't install the head unit but possibly something is installed wrong in the wiring. Anyone have a decent wiring schematic? 94 ranger

 

Wiring diagrams here: Ford Ranger Radio Wiring Diagram

Yes, either it was hooked up wrong or the radio has internal short