Motorola Astro XTL 5000 Instruction Manual - Page 29
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Dual-Radio Installation: Installation Considerations
The black cables must have a good ground connection if the radios are to operate properly, and to
prevent damage to the radios and cable kits. They should be grounded to the vehicle frame in the
same location. On some late-model automobiles, the ground connection between the vehicles
chassis and engine block is inadequate for good mobile radio operation. DO NOT remedy this by
connecting the radio units ground cables directly to the battery. Connect a flexible metal ground strap
between the engine block and a vehicle chassis point common to the radio set ground. Be sure the
strap is heavy enough to carry maximum transmitter supply current.
All cables should be dressed out of the way as much as possible to prevent damage.
5.2.2.3 Ignition Cable
The 3064426H01 Dual-Radio cable has an ignition sense cable that must be used with every mobile
installation. The ignition sense cable allows the radio to be turned on and off with the vehicle ignition
switch, and allows the radio to remember the state of the radio on/off switch, even if it is changed
while the vehicle is off.
• For radio ON/OFF control independent of the ignition switch, connect the orange ignition cable
to "battery hot" at the vehicle fuse block.
• For radio ON/OFF control via the ignition switch, connect the orange ignition cable to "ignition"
at the fuse block.
The ignition sense cable uses either a 3-Amp (P/N 6580283E01) or 4-Amp (P/N 6580283E02) fuse.
For other considerations when connecting the ignition cable, see the ASTRO XTL 5000 Digital
Mobile Radio Basic Service Manual (P/N 6881096C73).
5.3
Installation Considerations
Be aware of the following installation considerations:
1. Turn the vehicle's ignition switch off during installation.
2. Connect both black leads to the same vehicle chassis point. This prevents possible ground
loop damage to the system should the ground point become bad.
3. Locate all fuses near the battery or the ignition.
5.4
Power Connections
Do the following:
1. Route the orange fused lead to the ignition voltage or battery voltage (see
"Ignition
2. Route the red fused lead from each radio directly to battery positive.
3. Connect the black lead from each radio to the vehicle chassis.
5.5
Dual-Radio Handheld Control Head Cable
Refer to
Figure 5-1 on page
PMN1035A to the dual remote radios via the quick-disconnect.
NOTE: Follow standard installation practices when routing and connecting all system cables. Use
labels to identify both ends of each cable and make sure that all connections are electrically
sound. Be sure that cables are secure and not routed or lying where they can be snagged,
cut, or crushed.
9964416H03-O
Cable").
5-1. The 3064426H01 cable connects the Handheld Control Head kit
5-3
Section 5.2.2.3,
October 27, 2004