WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
(L914) CARGO LAMP SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND
(L914) CARGO LAMP SWITCH SIGNAL CIRCUIT FOR A SHORT TO THE (Z910) GROUND CIRCUIT