RAM ProMaster 2014 Owner's Manual page 111

Load Compartment Power Outlet
The Load Compartment Power Outlet is located on the
left rear side of the rear cargo compartment. The outlet
can be is used for powering 12 Volt adaptive accessories
and recharging communications devices.
NOTE: Do not connect devices with power higher than
180 W to the socket. Do not damage the socket by using
unsuitable adaptors.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 109
Power Outlet Fuse Locations
1 — F114 Fuse 20 A Yellow Front Power Outlet
2 — F09 Fuse 15 A Blue Rear Power Outlet
3