Problem!! My reverse lights won't work and my trailer lights won't work either. My trailer lights work on any other truck. My reverse light bulbs are good. The guy at the parts house said the reverse lights were caused by a bad neutral safety switch. I dont know if the 2 problems are caused by the same thing or not. I also can't locate the safety switch. Any help would be appreciated!

 

Before anything, check all fuses.

 

And if they're all good?

 

+2.