User Manual

The lighting control unit is limited to 5 amps
total, or two (2) 25 watt incandescent bulbs
per side. Do not wire more than two
incandescent bulbs per side to the vehicle
tail lamp fixtures. If more than two bulbs
are required for each tail lamp fixture,
install LED type lamps, or contact your
nearest authorized dealer for other options.
•
Trailer Turn and Vehicle Forward
Side Facing Turn Lamp Circuit
The lighting control unit is limited to 20
amps or nine (9) 25 watt incandescent
bulbs total (per side) for the combination of
trailer turn lamps and vehicle forward side
facing turn lamps. Do not wire more than
nine incandescent bulbs per side for the
combination of trailer turn lamps and
vehicle forward side facing turn lamps.
If more than nine bulbs per side are
required, install LED type lamps, or contact
your nearest authorized dealer for other
options.
CAUTION
Before installing additional vehicle
stop/turn lamps, trailer turn lamps or
additional forward side facing turn
lamps on the vehicle, make sure the
lighting circuit limits described above
are
not exceeded. Exceeding the num-
ber of lamps designated above can/will
cause the electronic control unit to de-
fault to a protection mode, causing the
lamps to not function properly.
Similar to the headlamp system, if a
problem is detected with the electronic
control unit, the control unit will cycle the
turn signals of
f once every 9 seconds. You
can detect that this is occurring if the turn
signal indicators in the dash operate
intermittently.
If you experience intermittent turn signal
operation, the problem is either a short in
the turn signal circuit or the maximum
number of bulbs has been exceeded for
the circuit.
If you experience any vehicle stop/turn
signal issues, contact your nearest
authorized dealer.
Vehicle CAN Bus
Your vehicle is equipped with a CAN bus
electrical system. Because of how the
electrical system is designed it is important
that any accessories added after the
vehicle is built are installed only on the K-
CAN or the S-CAN. These dedicated CANs
are provided on the driver's side of the cab,
near to the interior fuse panel. Access to
the K-CAN and S-CANs is provided by two
RP1226 connectors. DO NOT tap into,
connect to, tamper with, or splice into any
CAN network other than the K-CAN or the
S-CAN. Connecting to a unapproved CAN
network may trigger CAN fault codes.
CAUTION
Connecting to an unapproved CAN
network
may trigger CAN fault codes.
The manufacturer will not warrant fail-
ures or damage caused to CAN net-
work components when the failure or
damage is a result of improper con-
nections to the CAN network.
MAINTENANCE - Electrical System
Y53-6113-1A1 (11/20) 235
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