Connecting the power cords, Ground information, Negative ground system – Uniden PC122AM/SSB User Manual
Page 3: Positive ground system
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CONNECTING THE POWER CORDS
With regard to the connection of the power cords, it may be possible or desirable to
connect the red lead (for negative ground systems) or the black lead (for positive
ground systems) to the ignition switch accessory terminal so that the radio is auto
matically turned off when the ignition switch (key) is turned off.
Alternately, the power lead may be connected to an available terminal on the fuse
block or even to a point in the wiring harness. Care must be taken, however, to guard
against a short circuit condition. When in doubt, please contact your vehicle dealer for
specific information for your vehicle.
GROUND INFORMATION
A negative ground system is generally identified by the " — " battery terminal being
connected to the vehicle motor block, but if you cannot determine the polarity of
your vehicle, consult your vehicle dealer for information.
NOTE: This radio may be installed and used in any 12-volt DC negative or positive
ground system.
NEGATIVE GROUND SYSTEM
If you are operating on a negative ground system, connect the red DC power cord
from the radio to the positive "+" battery terminal or other convenient point and
connect the black power lead to the chassis or vehicle frame, or the negative " — "
terminal of the battery.
POSITIVE GROUND SYSTEM
If you are operating on a positive ground system, connect the black DC power cord
from the radio to the negative " — " battery terminal or other convenient point and
connect the red power lead to the chassis or vehicle frame, or the positive " -t "
terminal of the battery.
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