Installation Guide

Cable Installation Terrestrial Mobile Communications Terminal Installation Instructions
18 QUALCOMM Proprietary 80-53184-1 Rev. A
You may connect the accessory wire (green wire labeled “lights”) if you install an optional accessory
such as the Remote Message Waiting Light, Buzzer, or Pager.
Follow these steps to connect the Power/Accessory Cable wires:
5. The yellow wire labeled +12 VDC BTRY (pins A & B) is for the unswitched (main) 12 VDC
connection. Connect this wire to an unswitched +12 VDC power source, such as the hot side of
the vehicle main wiring bus, the battery side of the ignition switch, or the battery side of the fuse
block (not the load side). This line provides constant +12 VDC to the MCT and must not be
connected to the accessory bus or any other switched line.
6. The black wire labeled +12 VDC IGNITION (pin E) is for the switched (ignition) connection.
Connect this wire to the switched +12 VDC power source, such as the ignition side of the
ignition (key) switch or the ignition side of the fuse block. Do not use accessory power.
7. The green wire labeled LIGHTS (pin F) is for the Remote Message Waiting Light, Buzzer, and/
or Pager accessories. Install these accessories according to the instructions in the appropriate
chapter of this manual.
8. Do not leave unused wires dangling loose behind the dashboard. Exposed ends should be tied
back neatly with tie-wraps.
9. The black wires (pins C & D) should be connected to a good grounding surface on the chassis or
one that is connected to the chassis (vehicle frame).