5
Mic. Speaker Cradle Privacy Handset Power
Diagram 3
3. Route the cables out of the way to avoid physical or visual obstruction.
Caution! The Hands‐free unit should be used with a negative ground system only.
Power Cable Installation
The power connector connection is as follows:
BOTH
Green
and
Red
need + 12 VDC
12VDC + Ignition
12 VDC +
Stereo Mute
12 VDC
-
Diagram 4
1. Route the black lead of the main power cable to convenient negative supply voltage (ground)
chassis ground and the red lead to the positive supply voltage connection points. If it is necessary to
penetrate the firewall, use an existing opening.
2. If necessary, drill a new hole approximately 9/16” or 3.5cm in diameter. Make sure that there is
enough clearance on the opposite side. Insert a grommet into the hole to prevent damage to the
power cable.
3. Cut the black lead to the desired length.
4. If the connection is being made under the dash or in the vehicle cabin, connect the black lead
directly to the chassis of the vehicle. Note! Do not connect the black lead to the negative (‐) battery
terminal. The car could be damaged if there were a malfunction in the vehicle’s electrical system.
5. Cut the red lead to the desired length. This lead will be connected such that it has positive supply
voltage at all times, even when the vehicle is turned off.
6. If the connection is being made under the dash or in the vehicle cabin, connect the red lead to a
positive supply voltage point.
7. If the connection is being made in the engine compartment or directly to the battery, connect the
in‐line fuse holder between the red lead of the power cable and the desired positive voltage
connection point.
