what is the best wat to get switched power in my 1992 jeep Cherokee. I want to run some extra lights?

 

Depends on how much "extra"? Care to provide some details? What kind of lights, how many, how bright?

 

More details would really help. But I'll guess more forward lighting? From the battery -> fuse -> relay -> lights. Control the relay from a switch inside, power to the relay from a circuit that's only on with ignition.