BL-CB33-0115 - 03-01-2018 10-1
SECTION 10
ELECTRICAL COMPONENTS
10-1.ELECTRICAL CONTROL PANEL
10-1.1.Maintenance
NOTE: Erratic operation of the truck may be caused
by defective controller. Before removing the
electrical panel, perform troubleshooting pro-
cedures per SECTION 4, to determine cor-
rective action to be taken.
There are no user-serviceable parts inside either con-
troller. No attempt should be made to open the control-
lers. Opening the controllers may damage them and
will void the warranty.
The controllers are programmed at the factory specifi-
cally for the truck model on which it is equipped. It is
important to replace the controllers with the correct
preprogrammed unit to assure proper performance
settings intended for that particular truck. See parts
section for the preprogrammed controller number.
It is recommended that the controller exterior be
cleaned periodically.
10-1.2.Cleaning
1. Turn off the key switch and disconnect the batter-
ies.
2. Remove the compartment covers as described in
paragraph 5-3.
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 bending the buss bars.
10-1.3.Panel Removal.
1. Turn off the key switch and disconnect the batter-
ies.
2. Remove the compartment covers as described in
paragraph 5-3.
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.
Refer to Figure 10-2 for location and identity of the
major replacement components mounted on the panel
and remove defective parts.
NOTE: Contactor is not repairable and must be
replaced if defective.
10-1.5.Panel Installation.
1. Install the control panel and secure with two
screws, two lock washers and two flat washers .
2. Connect all electrical cables to the control panel
as noted during removal.
3. Install the compartment covers as described in
paragraph 5-3.
4. Reconnect the batteries and turn on the key-
switch.
10-2.HORN REPLACEMENT
1. Turn off the key switch and disconnect the batter-
ies.
2. Remove the compartment covers as described in
paragraph 5-3.
3. Tag and disconnect all electrical connections from
horn.
4. Remove screw, lock washer, flat washer and
horn.
5. Install horn and secure with screw, lock washer,
flat washer.
6. Install the compartment covers as described in
paragraph 5-3.
7. Reconnect the batteries and turn on the key-
switch.
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