User's Manual

14221-1510-4440, Rev. B
40
Before making connections to the battery’s positive post, carefully disconnect the
battery’s negative (ground) cable(s). This will prevent tools or other metallic
objects which come in contact with the battery’s positive terminal from shorting to
vehicle ground, causing sparks or even a fire or an explosion! When disconnecting
the negative cable(s), cover/insulate the positive post(s) if it is not already so a tool
cannot short between the posts. Some vehicles, such as those with diesel engines
have more than one battery; in this case, disconnect the negative cables at all
batteries.
Radio fuses should not
be installed until all wiring is complete. This will prevent
the radio from powering up prematurely and/or causing an in-rush of current that
could lead to shorting of the battery, sparks, or even fire.
2. Obtain the orange waterproof (HFB type) fuse holder included with the DC Power Cable.
3. Observe and follow the previously presented WARNING!
4. Cut the red wire to the required length for connection to the battery’s positive (+) battery terminal (or
the main DC bus bar or stud).
5. Prepare to splice the fuse holder into the red wire by cutting it again, at approximately three (3) to six
(6) inches from the end.
6. Strip all three (3) wire ends back approximately ⅜-inch, place a fuse holder shell on each wire, and
securely crimp a fuse holder terminal to each wire end. Before crimping, verify fuse holder shells are
oriented in the correct directions (i.e., with each large end towards the wire end).
7. Label this fuse holder and red wire appropriately (e.g., “VHF Radio Main Power: 15-AMP FUSE”).
8. Do NOT install a fuse into the fuse holder at this time.
9. Crimp an appropriate electrical terminal to the short red wire. A corrosion-resistant ⅜-inch ring
terminal is included with the cable for this purpose, but another size corrosion-resistant terminal type
(not supplied) may be used if required.
10. Connect the ring terminal directly to the battery’s positive post (or if present, to a stud on the battery’s
main/non-switched power distribution terminal block).
7.2.2.3 White Wire Connection
A review of the information presented in Section 7.2.1 (page 38) may be beneficial at this time. As
required per the chosen power-up configuration, connect the white wire by following one of the three
procedures presented in the respective sub-section that follows.
7.2.2.3.1 Radio and Control Head Turn On and Off with Vehicle’s Ignition Switch/Key
With this wiring configuration, the radio and control head automatically turn on and off with the vehicle’s
ignition switch/key. The white wire is sometimes referred to as the “white ignition switch wire” or the
“ignition sense input wire.” In this configuration, the white wire connects to a switched power source,
typically identified as “Accessory” power, that switches on and off with the vehicle’s ignition switch/key.
When using this configuration, the on/off/volume control must be left in the on position
for automatic
power-up/down to function properly.
WARNING