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Electrical Schematic
From Tow
Trailer
Vehicle Controller
Plug
(Typically Blue)
+12 Volt
40 Amp
Circuit From
Tow Vehicle
Ground From
Tow Vehicle
Charger
vehicle battery). The DX Series brake actuator needs to be located as
close as possible to the battery near the front of the trailer. DO NOT
mount the DX Series brake actuator near the trailer axles or rear of
the trailer. Having the wire length longer than 25 feet may cause issues
with performance and the normal operation of the unit.
It is critical that the BLACK power lead and WHITE ground lead from
the tow vehicle to the input of the actuator are sized and properly
terminated (i.e. dedicated 30-40* amp circuit on the tow vehicle – 12
gauge wire minimum). 10-gauge wire is recommended to optimize
performance. Consult the SAE wiring guidelines for proper trailer
electrical harness design.
*Low temperature applications below 0°F require a 40-amp circuit.
The blue wire from the electric brake controller is connected through
the trailer plug to the blue wire on the actuator. The yellow wire from
the DX Series brake actuator is connected to the cold side of the trailer
emergency breakaway switch. Under no circumstances should the
actuator blue wire and the DX Series brake actuator yellow wire be
connected together, nor should the blue wire ever be grounded.
The white wire is connected to the trailer ground and also connected
to the tow vehicle ground through the trailer plug. The black wire is
connected to the +12V power line from the tow vehicle. The black wire
can also be connected to large on-board batteries. The black wire
is connected to the small breakaway battery only through the black
wire on the charger of the breakaway battery. When connecting and
disconnecting the black wire, sparking may occur. This is a normal
occurrence.
2021.02 | 4
BLUE
BLACK
WHITE
Lanyard
Break-
Away
Switch
ORANGE/BLACK
Breakaway
Battery
Connect
12 Volt
To The
9 Amp Hour
Trailer
Minimum
Ground
Circuit
YELLOW
Note: Either an onboard or breakaway
battery may be used.
Electrical Installation Requirements
Requires an Electric Brake Controller – The Dexter DX Series brake
actuator is intended to be used with an electric brake controller in the
tow vehicle. The unit will operate with a wide variety of controllers but
provides optimum performance when used with a Dexter electric brake
controller . The electric brake controller must have an output capacity of at
least 5 amps for proper operation of the Dexter DX Series brake actuator.
Although compatible, time based brake controllers are not recommended.
CAUTION
It is the responsibility of the end user to ensure that their electric
brake controller is compatible with the Dexter DX Series brake
actuator. Dexter attempts to provide compatibility with most
controllers available, but is unable to anticipate design changes
that might be introduced by the various controller manufacturers.
Electrical Connections – Make sure all electrical connections are
clean, dry, weather tight, and secure to prevent damage to the wiring
from dragging or becoming entangled with foreign objects. A dedicated
ground connection between the tow vehicle and trailer is also required.
Breakaway Battery Requirement – To comply with federal
requirements, the trailer must be equipped with a breakaway switch and
battery. The breakaway battery needs to have a minimum capacity of 9
amp hours and needs to be maintained in a fully charged condition at
all times. The breakaway battery should be checked for proper charge
level before every use.
ADAPTER
058-036-00
(IF REQUIRED)
Hydraulic
Line
DX SERIES SERVICE MANUAL
ELECTRIC/HYDRAULIC ACTUATORS
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