User's Manual

14221-1510-4440, Rev. B
38
7.2 DC POWER CABLE INSTALLATION
7.2.1 Overview of On/Off Power Wiring Configurations
The following power wiring configurations are supported:
• Radio and control head turn on and off automatically with vehicle’s ignition switch/key — This
configuration allows the on/off state of the vehicle’s ignition switch/key to control the on/off power
state of the radio and control head. The white wire of the radio’s DC Power Cable is connected to a
fused switched power source, typically identified as vehicle “Accessory” power. This source must
switch on (up to positive (+) battery voltage potential) when the vehicle’s ignition switch/key turns
on, and it must switch off (to near zero volts) when the ignition switch/key turns off. The required
fuse rating is 3 amperes. When using this configuration, the on/off/volume control must be left in the
on position for automatic power-up/down to function properly.
• Radio and control head turn on and off with a manual switch — This configuration is used when,
for example, the radio and control head have to remain on even when the ignition key must be
removed from the vehicle and
a separate on/off switch is acceptable. The white wire of the radio’s
DC Power Cable is connected to one side of a manually-controlled switch, and the other side of this
switch is connected to unswitched and fused
vehicle power. The required fuse rating is 3 amperes.
When using this configuration, the on/off/volume control must be left in the on position
for automatic
power-up/down to function properly.
• Radio and control head turn on with its on/off/volume control (“hot wired”) — This
configuration allows radio and control head on/off power control only via its on/off/volume control. It
may be desired if, for example, the radio and head have to remain on even when the ignition key must
be removed from the vehicle and a separate on/off switch is not desired and/or not acceptable. The
white wire of the radio’s DC Power Cable must be connected to unswitched and fused
vehicle power.
The required fuse rating is 3 amperes.
Unlike some remote-mount mobile radio installations, a remote-mount XG-25M radio
installation’s control head does not require its own DC power cable and fuse (i.e.,
separate from the radio). The head receives DC operating power from the radio via the
Remote Control Cable.
In all of the above listed cases, the radio’s main DC power input (red wire) must be connected through an
in-line fuse to unswitched vehicle DC power. The red wire must be connected to raw battery power
(positive battery terminal) via the supplied fuse.
7.2.2 DC Power Cable and Main Fuse Holder Installation
The radio’s DC Power Cable has a 3-pin connector, a 20-foot red wire (for the main power connection), a
20-foot white wire (for the switched power source connection), and a 4-foot black wire (for the ground
connection). It is supplied with waterproof fuse holders, two AGC-type fuses, and non-insulated ring
terminals. The following installation procedures are recommended:
7.2.2.1 Black Wire Connection (Ground Wire)
1. Connect the radio’s DC Power Cable to the radio by mating its 3-pin connector to the radio’s 3-pin
power cable connector as follows: Visually align the key and firmly push and turn the outer locking
ring clockwise until it stops. A click will be sensed to confirm proper mating.
NOTE