Remote-Mount Installations; Vip Input Connections (Remote-Mount Only); Figure 3-2. Cabling Interconnect Diagram For Dash Mount; Figure 3-3. Cabling Interconnect Diagram For Remote Mount - Motorola ASTRO W3 Service Manual

Theory of Operation: Vehicle Interface Port (VIP)
CAUTION
A good chassis connection via the black primary
power cable is essential for radio operation and
to prevent damage to the radio and cable kit.
Connection to the vehicle frame is desirable.
RADIO POWER CABLE (BLK/GROUND)
RADIO
CH
Rear connector
NOTE:
Caution: if you choose to connect the radio's IGNITION line directly to the car's battery, excess use of the radio when the car's ignition is not running (i.e. alternator running)
could result in a slow discharge of the car's battery. This configuration allows the radio to operate with the car's ignition switch ON or OFF.
If the radio's IGNITION line is wired to the car's ignition switch, the radio will only function when the car's ignition switch is turned ON.

3.4.1.1.2 Remote-Mount Installations

VIP outputs function exactly the same in remote-mount installations as the dash mount. However,
three VIP outputs are available at the remote-mount accessory cable connector. VIP OUT 1 is on pin
12, VIP OUT 2 is on pin 3, and VIP OUT 3 is on pin 15.
RADIO COMPARTMENT
CAUTION
A good chassis connection via
the black primary power cable
is essential for radio operation
and to prevent damage to the
radio and cable kit. Connection
to the vehicle frame is desirable.
RADIO
RADIO
POWER CABLE
(BLK/GROUND)
NOTE:
The orange and green power cables connect to either the vehicle battery or the ignition switch. Connect the green cable directly to the battery. The receiver operates
when the control head is on. Connect the orange cable to the ignition switch. The transmitter operates only when the ignition switch is on. Alternate connections:
Connecting both green and orange cables to the battery allows the control head to turn the receiver and transmitter on or off. Connecting both green and orange cables
to the ignition switch allows the ignition switch to turn the receiver and transmitter on or off. (Alternator whine and other noise problems may occur. Isolate the green
cable with a Motorola relay, part #59-00813674.)

3.4.1.2 VIP Input Connections (Remote-Mount Only)

Three VIP input lines are also available in remote-mount installations. VIP IN 1 is on pin 14, VIP IN 2
is on pin 10, and VIP 3 is on pin 9. These connections are used to accept input from switches or
other circuits in the vehicle. The VIPs are biased at about 5 volts, and to be activated the inputs are
switched to ground. Normally, a switch is connected from a VIP input line to ground. The switch can
be normally open or normally closed, depending on VIP programming and the particular function
being performed.
6881096C77-O
RADIO COMPARTMENT = OPERATOR COMPARTMENT
MICROPHONE
SPEAKER

Figure 3-2. Cabling Interconnect Diagram for Dash Mount

MICROPHONE
RADIO (ORG)
VIP
MIC
GROMMET
RADIO CONTROL
CABLE (BLK/MULTI-
CONDUCTOR)

Figure 3-3. Cabling Interconnect Diagram for Remote Mount

IGNITION SWITCH
ON/ACC
RADIO IGNITION
CABLE (thin RED)
3A OR 4A FUSE
RADIO POWER CABLE
(RED/BATTERY HOT)
OPERATOR COMPARTMENT
TRANSMITTER
CONTROL
CABLE (ORG)
(GRN)
4.0A FUSE
SPEAKER
RECEIVER
RADIO POWER CABLE
CONTROL
(RED/BATTERY HOT)
CABLE (GRN)
VEHICLE BATTERY
COMPARTMENT
VEHICLE
PART OF
VEHICLE
GROMMET
WIRING
SEE NOTE
(-)
(+)
15A OR 20A
FUSE
VEHICLE
BATTERY
MAEPF-27646-O
VEHICLE BATTERY
COMPARTMENT
VEHICLE
IGNITION SWITCH
ON/ACC
GROMMET
SEE NOTE
(+)
15A OR 20A
FUSE
VEHICLE
BATTERY
MAEPF-27616-O
September 26, 2003
3-13
PART OF
VEHICLE
WIRING
(-)