[XJNick]

So are you getting vacuum at the two back ports of the shift motor when the shift lever is in 4HI? The PART TIME indicator light is controlled by a vacuum switch tied into the line going to these 2 ports, so if no vacuum, no lamp and no axle shift. Also could be bad vacuum switch on transfer case, unscrew and see if stuck.

Hope this helps
-Nick[addsig]

	Transfer Case Mounted behind and driven by the vehicle transmission, the transfer case transmits power to the front and rear driveshafts in 4WD Jeep vehicles and offers high and low range.