Ram Trucks 2010 Chassis Cab - Manual (Page 310)

NOTE: Replacement batteries should both be of equal
size to prevent damage to the vehicle’s charging system.
Your vehicle is equipped with two 12-Volt batteries. If it
becomes necessary to use a booster battery with jumper
cables to start a vehicle’s engine because its batteries are
discharged, the following procedure should be used:
Set the parking brake and place an automatic transmis-
sion in PARK (or NEUTRAL for a manual transmission).
Turn off lights, heater and other electrical loads. Observe
charge indicator (if equipped) in both batteries. If the
indicator (if equipped) is light or yellow on either battery,
replace that battery.
CAUTION!
Use the jump-start procedure only when the charge
indicator (if equipped) in both batteries is dark in the
center. Do not attempt jump-starting when either bat-
tery charge indicator (if equipped) is bright or yellow.
If the charge indicator (if equipped) has a green dot in
the center, failure to start is not due to a discharged
battery and cranking system should be checked.
1. Attach one jumper cable to the positive terminal of
booster battery and the other end of the same cable to the
positive terminal of the discharged battery.
WARNING!
Do not permit vehicles to touch each other as this
could establish a ground connection and personal
injury could result.
308 WHAT TO DO IN EMERGENCIES