operators_manual

that will prevent you from starting your
vehicle.
WARNING
Do not use the Spare Battery A and B
circuits or other circuits that are con-
trolled by the LVD to power electronic
engine controls, ABS circuits, or safe-
ty/work related lighting. Before adding
any device to the vehicle's electrical
system, consult your nearest author-
ized dealer or read the contents of
TMC RP136. Failure to do so may
cause equipment damage or lead to
personal injury.
NOTE
The determination of what circuits/
loads that were connected to the LVD
was based upon the recommendation
from Technology and Maintenance
Council (TMC) of the American Truck-
ing Association. To review the recom-
mended practice, see TMC RP-136.
The LVD will disconnect non-vital battery
loads when battery voltage drops below
12.2V for 2 minutes and the key switch is
in the ACC or OFF position. During the
next 30 seconds, the LVD will flash the
Battery Disconnect Telltale in the Driver
Information Display. As the telltale flashes
an audio warning will also sound. During
the last 2 minutes the LVD will emit a slow
audible beep. After 2 minutes of flashing
the warning on the DPC, the LVD will shut-
off any circuit connected through the LVD
system. Even if the ignition switch is cycled
OFF and ON again, the LVD will continue
to fault until it sees battery voltage at, or
above, 12.2V.
Circuits Disconnected By LVD
• Cab Dome Lamps
• Cab Accessories
• Spare LVD wiring for customer
added accessories
NOTE
All LVD circuits are color-coded blue
on the central electrical panel cover la-
bel.
How to Replace Headlamp Bulb
Replacing a headlight bulb is accomplished
by accessing the rear of the headlight via a
access panel in the front fender. Open the
hood to get access to this panel.
Access Door
PUSH TO OPEN DOOR
1. Park the vehicle and apply the
parking brakes
2. Open the hood and secure it in the
open position
3. Locate and open the access panel
on the inside of the fender well
MAINTENANCE - Electrical System
Y53-6047-2HEN (03/18) 229
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