Dodge 2004 Ram 2500 Owner's Manual page 337

To determine the battery charge, check the battery test
indicator (if equipped) on top of each battery. If the test
indicator (if equipped) appears light or yellow, replace
the battery.
NOTE: Replacement batteries should both be of equal
capacity to prevent damage to the vehicle's charging
system.
MAINTAINING YOUR VEHICLE
CAUTION!
It is essential when replacing the cables on the
battery that the positive cable is attached to the
positive post and the negative cable is attached to the
negative post. Battery posts are marked (+) positive
and negative (-) and identified on the battery case.
Also, if a "fast charger" is used while battery is in
vehicle, disconnect both vehicle battery cables be-
fore connecting the charger to battery. Do not use a
"fast charger" to provide starting voltage.
WARNING!
Battery posts, terminals, and related accessories con-
tain lead and lead compounds. Always wash hands
after handling the battery.
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