[joe231]

make sure you have power to the dimmer with the lights on, if you do then check for power out of the switch.
if that is good, check the connector that passes through the fire wall, and then the one that goes through the core support....
it is just a matter of figuring where there is no power. if you have power at the head lights then check your grounds.

my money is on the dimmer switch, they are subjected to dirt and water. could be corrosion on the connector, or internal corrosion.

you can use jeep (along with many other) coils on the rear if you have coils back there (some trucks have leaf springs in the rear) several on here have done it (including me) just search for "jeep coils"

drop spindles will lower the front and not effect the camber and travel, drop springs will cause negative camber and give you less suspension travel......