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8 February 2021
BD Universal Remote Mount Vacuum Brake
13
DFIV Calibration (Only for kits using a DFIV module)
Ensure the connections of the corresponding wires to the DFIV Control Module are
correct as shown in the wiring diagram.
To achieve the correct setting for the activation
of the exhaust brake in relation to the throttle
pedal the DFIV Module must be calibrated for
your vehicle.
Connect one end of a test light to the "BRAKE"
terminal of the DFIV module and the other end
to a good ground. With the throttle at idle, start
the engine and turn on brake switch. Then, using a small flat bladed screwdriver, turn
the small adjusting screw in the DFIV Module counterclockwise or clockwise until the
test light JUST turns on.
CAUTION: THE ADJUSTING SCREW IS A MICRO-SWITCH THAT IS VERY
DELICATE, SO TURN USING SMALL ADJUSTMENTS.
Test by revving up the engine to approximately 1200 RPM and releasing the throttle.
As the accelerator pedal is applied the test light should turn off just before the engine
starts to rev, indicating proper calibration of the DFIV Module with the APPS.
Then the test light should activate again when the throttle pedal returned to idle. If
not, readjust the DFIV Module so that it does. Reinstall lower dash cover.
Power and Toggle Switch
Mount the toggle switch in a convenient and
secure location on the dash. Locate a 12v
ignition switched source (fuse panel or wire),
then connect the in-line fuse holder to the
source line or use the fuse tapper (Diagram
7).
This power wire should be connected to the
middle terminal of the toggle switch. Ground
the black wire from the upper switch terminal
marked amber. Connect the lower switch
output terminal to the middle position on the
throttle micro switch or to the DFIV "Switch"
terminal. Connect the remaining terminal on
the micro switch to the exhaust brake control
valve you mounted earlier. Route this wire away from any heat sources or moving
parts.
BD Engine Brake Inc.
1-800-887-5030 | https://www.bddiesel.com
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