Peterbilt 579 - Electrical System

ELECTRICAL
5
ELECTRICAL
Electrical System
WARNING!
CAUTION
Battery posts, terminals and related
accessories contain lead and lead
compounds, chemicals known to the
State of California to cause cancer
and reproductive harm. Wash hands
after handling.
Do not modify or improperly repair the
vehicles electrical system or power
distribution box. All electrical repairs
should be performed by an authorized
dealer. Improper repair or modica
-
tions will void your warranty and/or
cause serious damage to your vehicle.
Low Voltage Disconnect (LVD)
Purpose
The LVD
may increase battery life
and prevent unnecessary jump
start conditions by ensuring that an
unattended load does not deplete
the battery charge to a level that will
prevent you from starting your vehicle.
Operation
The LVD
will disconnect non-vital
battery loads when battery voltage
drops below 12.3V for 3 minutes and
the key switch is in the ACC or OFF
position. During the last 2 minutes the
LVD will emit a slow audible beep. 30
seconds before disconnecting loads
the alarm will change to a fast beep.
The battery voltage must come back
up above a certain voltage before the
LVD will reset.
See an
authorized dealer if the LVD
fails to reconnect loads during normal
operation.
Circuits Disconnected
By LVD
• Cab Dome Lamps
• Cab Accessories
• Spare Battery A and B
NOTE
All LVD circuits are color-coded blue
on the central electrical panel cover
label.
5-76 Y53-6047–2C (04/13)