Vmac UNDERHOOD 70 Installation Manual page 43

Control Box
☐
Remove the kick panel in the driver side footwell.
☐
Mount the Control Box in a convenient location in the cab (such as the
lower dashboard panel), positioned such that the wire harness will reach the
compressor. Ensure there is adequate clearance for the door to close before
permanently mounting the Control Box.
Throttle Control
☐
Using cable ties, secure the throttle control under the dashboard, away from
moving parts and positioned so that the adjusting screws, or the buttons and
LED lights, are accessible.
Connecting the Wiring
☐
Unplug the OEM cable from the accelerator pedal and plug it into the matching
connector from the throttle control. Plug the cable from the throttle control into
the matching connector on the accelerator pedal.
☐
Connect the interface harness to the matching connector from the Control Box.
☐
Replace the kick panel.
☐
Attach the (×2) green wires with ring connectors to a good ground under the
dash.
Digital Throttle Control only*:
☐
*Locate the OBD II port (generally located under the dashboard, beneath the
steering wheel column).
☐
*Remove the fasteners securing the OBD II port to the dashboard; this provides
easier access to the wires at the back.
☐
*Peel back the tape on the harness a few inches.
The wires populating pins 6 and 14 are a twisted pair (blue and white
wires).
☐
*Locate the blue wire connected to pin 6 of the OBD II port (Figure 53).
☐
*Cut the blue wire approximately 2 in from the back of the OBD II connector.
☐
*Strip approximately 3/8 in from the end of both wires.
☐
*Twist the light blue wire from the throttle control together with the blue wire;
using the supplied butt connector, splice these paired wires to the blue wire at
pin 6.
VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: www.kb.vmacair.com
Figure 53 — OBD II connector
41