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Motorola APX O2 User Manual: Radio Operation Wiring For Dash And Remote Configurations; 2.1.3.1 Dash Mount: Power, Ignition, And Emergency Cable Installation

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2-14
2.1.3

Radio Operation Wiring for Dash and Remote Configurations

Determine from
controlled by the vehicle's ignition switch state, the physical wiring of the radio's ignition sense (ACC)
wire, and by the programmed CPS setting. For additional radio functionality as determined by the
programming of the ignition switch in CPS, refer to the HELP menu in your CPS (i.e. Ignition as:
Required, Blank, Soft Power Off, TX Inhibit, PTT TX Inhibit, Ignition Only Power Up).
Choose a clean ignition point which is not shared in the immediate vicinity by other high current
accessories/devices. This will help to reduce the transients on the ignition line. Examples of
high-current accessories/devices are: Air Horn, relays, lightbars and etc. It is recommended to wire
to the vehicle's ACC line, not the START or the solenoid side of the ignition circuit. Refer to chapter 6
for best installation practices. The Ignition sense (ACC) cable uses either a 3-amp fuse
(6580283E01) or 4-amp fuse (6580283E02).

2.1.3.1 Dash Mount: Power, Ignition, and Emergency Cable Installation

The standard dash mount rear ignition sense cable HLN6863 contains a "thin red" ignition wire, a
jumper wire that shorts emergency to ground, and two gray wires attached to an external speaker
plug. The thin RED wire is the ignition sensed wire. Refer to
correct wiring configurations.
NOTE: This cable MUST be attached in order for the radio to operate in Dash mount, regardless of
how emergency is programmed in CPS or wired inside the vehicle. Either the emergency
jumper wire or an emergency accessory (footswitch or button) must be wired to the rear of the
transceiver in Dash mount. Otherwise, upon attachment of the radio's power cable to the
vehicle battery, the radio will incorrectly determine that emergency operation has been
activated, such as when an emergency footswitch is de-pressed and the emergency pin is
ungrounded.
Table
2-1,
Table
2-2, or
Table 2-3
Standard Configurations Planning the Installation
the radio functionality you wish to achieve, which is
Table
2-1,
Table
2-2, or
Table 2-3
for its
6878215A01

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