Can anyone help with my problem of no low beams? All parking lights and High beams work and it is not the bulbs as I tried new. With a test lamp all three terminals at headlights are hot so I am assuming that the dimmer switch does something with ground. Any advice on where to check would be much appreciated.

 

I've done tried replacing switch assembly, checked fuses and relays with no luck. Problem appears to be in harness.

 

Check for rodent damage.