80-JB566-1 Rev. G
C-1
MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION
C
General Wiring and Installation Guidelines
Making Electrical Connections - Standard Installations
For standard MCP50 installations, the only electrical connection needed to the truck will be
the power/IO cable and an ignition wire lead. Cable connectors are used at the VTM for the
antenna, power/datalink, and display.
Cutting and Splicing Power/IO Cable - Non-standard Installation
Some trucks may use a different 9-pin diagnostic connector than supplied on the Omnitracs
“Y” cable. The connector on the Omnitracs cable may not easily mount in the dash.
Therefore, it may be necessary to make direct butt splice connections.
If the available Power/IO cable does not mate to the truck’s diagnostic connector, the “Y”
portion of the cable can be cut off and the leads spliced into an appropriate source:
•
BATT_V to 12 VDC unswitched source
•
BATT_RTN to chassis ground
•
J1708+ to positive J1587 truck wire
•
J1708- to negative J1587 truck wire
•
CAN_H to J1939+ truck wire (yellow to yellow)
•
CAN_L to J1939- truck wire (green to green)
