This is my procedure for my 2008 Unlimited Sahara:
Position behind M/H
Release Tow bar from catch
Install arms and spring loaded pins
Install safety/breakaway cables
Hookup Light wiring from M/H to Jeep
Hookup air line for Jeep braking
Hookup breakaway wire
Check to ensure lights function, Brake, turn signals, emergency flashers
Attach Road Guardian to base plate (Roadmaster product to prevent rocks from hitting Jeep)
This completes hookup oof Jeep toM/H
Release emergency Brake
Turn Key to On
Depress brakeandshift transmission to neutral
Shift transfercase to neutral
Start engine and place transmission in Drive to be surethat transfer case is in neutral
Shut off engine
Put transmission in park
Turn Ignition switch to on
Ensure all windowa are closed
Disconnect Battery ( disengage the large white fuse-don't remove) I bought an attachment from Cool Tech that attaches to the negative battery terminal that has a knob/wheel which I turn to disengage/engage the battery.
Close and secure hood
Sit in drivers seat and make sure battery is disconnected (no warning signals/dome lights)
Visually recheck-Emergency brake off, Key switch ON, Transfer case neutral, and Transmission in park
Pull M/H forward to ensure tow bar arms lock (or push Jeep backward)
Remove Tow bar in reverse order
Turn off engine
Shift transfer case to 2H (if difficult pull lever to 4H and then to 2H)
Shift transmission to park
Reset radio clock and settings
Hope this helps.
Should be good to go!
2008 Jeep Sahara '4Dr"