Ram Trucks 2010 Chassis Cab - Manual (Page 176)

22. SERV 4WD Indicator Light
The “4WD” indicator will be illuminated
whenever the four-wheel drive mode is en-
gaged on either the manual or electric shift
four-wheel drive systems. The “SERV 4WD
Indicator Light” monitors the electronic shift four-wheel
drive system. If the “SERV 4WD Indicator Light” stays on
or comes on while driving, it means that the four-wheel
drive system is not functioning properly and that service
is required.
23. Water In Fuel Indicator Light
Indicates there is water detected in the fuel
filter. If this light remains on, DO NOT start the
vehicle before you drain the water from the
fuel filter to prevent engine damage. Refer to
“Maintenance Procedures/ Draining Fuel/Water Separa-
tor Filter” in Section 7 for water drain procedure.
24. Tire Pressure Monitoring Telltale Light —
If Equipped
Each tire, including the spare (if provided),
should be checked monthly, when cold and
inflated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your vehicle
has tires of a different size than the size indicated on the
vehicle placard or tire inflation pressure label, you should
determine the proper tire inflation pressure for those
tires.)
As an added safety feature, your vehicle has been
equipped with a Tire Pressure Monitoring System
(TPMS) that illuminates a low tire pressure telltale when
one or more of your tires is significantly under-inflated.
Accordingly, when the low tire pressure telltale illumi-
nates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes the tire to
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