Something different, but I think its kinda neat.

 

so you're having trouble seeing when you're backing up . . . or just what's in the bed?

if you're just having problems with backing up, . . . you can still use the backup light idea, but use the reverse lights as a trigger to open the relay . . .

 

I believe he is wanting to see behind his truck when the truck is not in reverse. So when the truck is in park and he is behind the truck doing whatever he wants the reverse lights on to help see what he is doing.

 

exactly!

 

Hey, is there anywhere I can tap into the cargo light wire from under the hood?? I know the curtisy light and all that is on the same fuse...so does it split under hood, or in the dash. I can wire it from the dash, but dont want to have to