Warning: Insure that vehicle has an Electronic Shift Transfer Case WITH A "2H" SELECTION. If not see "F150 Manual Shift" or "F150 Control-Trac" If vehicle has an ELECTRONIC SHIFT TRANSFER CASE: Transmission: "NETURAL", Transfer Case: "2H" Hubs: "FREE" Note: Turn the ingition switch on. The "4WD" light & the "Low Range" lights will be off if the Transfer Case is in "2H". When you shift the transfer case to "Low Range" you should get a "Low Range" light, when you shift the transfer case to 4x4 the 4WD light should come on. IF YOU CANNOT INSURE THAT THE TRANSFER CASE IS IN "2H" AND ALL LIGHTS OR NOT LIT, YOU MUST PLACE THE VEHICLE ON A FLATBED, OR DOLLIES, OR REMOVE THE PROPELLOR SHAFT.