My 4WD light comes on and locks in untill restart.Changed sel swt and 4wd act.?

The 4WD selector switch and the 4WD actuator are both common failure issues on this vehicle. The best solution is to have it properly diagnosed by a professional technician...proper diagnostics does cost money, however, it will ensure a proper diagnosis and will often save money and frustration by having the proper repair performed the first time.