Motorola ASTRO Digital Spectra Installation Manual - Page 28
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MDC Emergency
Pushbutton or
Footswitch
Installation
Horn and Lights
(External Alarms)
Relays
22
All ASTRO Digital Spectra radios and Spectra radios have
!
accessory connector pins 2 and 8 connected together to allow
the radio to power down. Opening this connection by
REMOVING the accessory connector, or otherwise failing to
C a u t i o n
maintain a normally closed path, could, if left unchecked, drain
the vehicle battery, and possibly cause transmissions to occur.
To install an option or accessory perform the following
installation procedure:
1. Select an appropriate place to mount the option or
accessory hardware.
2. Connect male pin control leads (wires) to the accessory
cable connector in the appropriate location.
3. Route accessory-to-control head cables under floor
coverings or behind panels so that the vehicle occupants
do not snag and break the wires.
For A3 model control heads, pin information is included in Figures 3, 6, and
7.
Mount the footswitch using the hardware that comes with the kit. Open the
accessory cable connector housing; remove the jumper wire. Connect the
emergency switch wires to pins 2 and 8 (see Figure 19). Close the
connector housing; route the finished cable from the switch location to the
control head location.
SPST NORMALLY CLOSED
EMERGENCY SWITCH
NOTE 1: REMOVE BLACK JUMPER WIRE INSIDE
ACCESSORY CONNECTOR HOUSING.
INSERT WIRES FROM EMERGENCY SWITCH
DIG GND
8
Figure 19 Emergency Switch Wiring Diagram
For installations that use the horn/lights option, select a suitable location
for mounting (normally under the dash) and, referring to Figure 20, perform
the following procedure:
NOTE: The handheld control head can have a horn or light option, but
not both. Control wires for either option should be connected to
pins 12 and 4 of the accessory connector.
1. Horn Relay–Connect the relay contacts across the horn ring switch,
typically found in the steering column. Open the accessory cable
connector and connect the two control wires (male pins) into locations
12 and 4 of the connector.
EMER
7
4
6
5
3
2
1
15
12
10
9
14
13
11
NOTE 1
PIN 2
PIN 8
ACCESSORIES
CONNECTOR