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10-1. ELECTRICAL CONTROL PANEL
10-1.1. Maintenance
NOTE: Erratic operation of the truck may be caused
by defective controller components. Before
removing
the
troubleshooting procedures per Section
2.4, to determine corrective action to be
taken.
There are no user-serviceable parts inside the control-
ler. No attempt should be made to open the control-
ler. Opening the controller may damage it and will void
the warranty.
The controller is programmed at the factory specifi-
cally for the truck model on which it is equipped. It is
important to replace the controller with the correct
preprogrammed unit to assure proper performance
settings intended for that particular truck. See
4-1
for the preprogrammed controller number.
It is recommended that the controller exterior be
cleaned periodically, and if a hand held programmer is
available, this periodic cleaning provides a good
opportunity to check the controller 's diagnostic
history file. It is also recommended that the con-
troller 's fault detection circuitry be checked
whenever the vehicle is serviced.
10-1.2. Cleaning
1.
Engage the emergency stop switch and turn off
key switch.
2.
Remove the compartment covers as described
in paragraph 5-2..
3.
Remove any dirt or corrosion from the bus bar
area. The controller should be wiped clean with a
moist rag. Allow it to dry before reconnecting the
battery.
4.
Make sure the connections to the buss bars are
tight.Use two well insulated wrenches for this task
in order to avoid steering the buss bars.
10-1.3. Panel Removal
1.
Engage the emergency stop switchand turn off
key switch.
2.
Remove the compartment covers as described
in paragraph 5-2..
BL-PDSR 30-0319 - 03-07-2019
SECTION 10
ELECTRICAL COMPONENTS
electrical
panel,
perform
Figure
3.
Tag and disconnect all electrical cables which
connect to the control panel.
4.
Remove four screws, four lock washers, four
flat washers and control panel.
10-1.4.
Panel Disassembly
4-
Refer to
Figure 10-2
major replacement components mounted on the
panel and remove defective parts.
NOTE: Contactor (2or17) is not repairable and must
be replaced if defective.
10-1.5.
Panel Installation
1.
Install the control panel and secure with four
screws, four lock washers and four flat washers.
2.
Connect all electrical cables to the control panel
as noted during removal.
3.
Install the compartment covers as described in
paragraph 5-2..
4.
Disengage the emergency stop switch and turn on
key switch.
10-2.
HORN REPLACEMENT
1.
Engage the emergency stop switch and turn off
key switch.
2.
Remove the compartment covers as described
in paragraph 5-2..
3.
T ag and disconnect all electrical connections from
horn.
4.
Remove screw, lock washer, flat washer and
horn.
5.
Install new horn and secure with screw, lock
washer, flat washer.
6.
Install the compartment covers as described in
paragraph 5-2..
7.
Disengage the emergency stop switch and turn on
key switch.
for location and identity of the
10-1
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