Ram Trucks 2015 Chassis Cab Commercial - Owner Manual - Manual (Page 178)

NOTE: The courtesy/reading lights will remain on until
the switch is pressed a second time, so be sure they have
been turned off before leaving the vehicle. If the interior
lights are left on after the ignition is turned OFF, they will
automatically turn off after 15 minutes.
ELECTRICAL POWER OUTLETS
The auxiliary 12 Volt (13 Amp) power outlets can provide
power for in-cab accessories designed for use with the
standard “cigar lighter” plug. The 12 Volt power outlets
have a cap attached to the outlet indicating “12V DC,”
together with either a key symbol or a battery symbol.
A key symbol indicates that the key must be in the
ON/RUN or ACC positions for the outlet to provide
power. The battery symbol indicates that the outlet is
connected to the battery, and can provide power at all
times.
NOTE:
To ensure proper operation, a MOPAR® knob
and element must be used.
Rear Passenger Courtesy/Reading Light
176 UNDERSTANDING THE FEATURES OF YOUR VEHICLE