Try disconnecting the neg terminal from the battery and wait 5 minutes. It will reset the computer, worth a try and it cost nothing.
Good luck and let the board know if it works
DATE: September 15, 2007
Intermittent Illumination Of The Courtesy Lamps And Liftgate Ajar Indicator With Chime Tone
This bulletin involves switching the wires in the liftgate ajar switch connector.
2007 - 2008 (KA) Nitro
2008 (KK) Liberty
2008 (KK) Cherokee (International)
2007 - 2008 (WK) Grand Cherokee
2007 - 2008 (WH) Grand Cherokee (International Markets)
2006 - 2008 (XK) Commander
2006 - 2008 (XH) Commander (International markets)
2006-2007 (HB) Durango
2007 (HG) Aspen
2008 (RT) Caravan/Town & Country
NOTE :This bulletin applies to all KA/KK vehicles built before August 18, 2007 (MDH 0818XX) and WK/WH vehicles built before September 11, 2007 (MDH 0911XX),
NOTE :This bulletin applies to XK/XH vehicles built before September 11, 2007 (MDH 0911XX) and RT vehicles built before October 22, 2007 (MDH 1022XX) built without sales code JRC (powerlift gate).
Customers may observe illumination of the courtesy lamps, a chime tone and the liftgate ajar indicator message illumination when the liftgate is not open. This is caused by intermittent contact of the liftgate open sensing wire closing the circuit to ground. Swapping the wires will make the intermittent contact with the body on the ground side wire eliminating the false illumination and indicator messages.
If the above condition is present, perform the Repair Procedure.