right signal on. Anyone know how to fix this? Its kind of wierd. I'm thinking the problem is in the switch.

 

If you have a trailer wiring harness, unplug it and see what happens. They do strange things when they fail.

If not or if that doesnt help get your alternator tested. They also do strange things on isuzus when they fail.

Could very well be the switch but at least those 2 checks are free (any auto parts store should check the alt for free) and will eliminate them as possiblities.