Hogtunes NCA 450-RM : 4 Channel Amplifier / 4x50 watts (2014 - model year) - Manual (Page 6)

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  •Youwillseea“fader/nofader”switchonthesideoftheamp.
In this option you will put the amp to the “no fader” setting.
Also on the side of the amp is a switch to adjust the volume of
the rear channels (compare to the volume of the front speakers)
In most cases, you will leave this adjustment at the +3 setting.
NOTE: As Hogtunes releases more speaker kits for Rushmore
bikes, they will come with the correct harnesses, so the
supplied rear accessory harness described in this section
may not be used.
Step #6: Sit the amp on top of the silver plate so when standing in front of the
bike you can read the Hogtunes logo on top of the amp. Re-install the
amp to the plate using the four screws removed earlier.
Step #7: Also in Fig 1.2 is a white square which shows a smaller black 2 pin
factory plug. The orange wire from the amp has a plug that goes
directly into this factory harness. On the factory plug we are describing,
there maybe a factory plug with no wires already installed into it which
will have to be removed. The factory wire colors going into the plug
are Purple/blue stripe and black and can be see under the factory
sheathing. The orange wire is the amplifier’s “turn on” lead and tells the
amp to turn on/off with the bike’s ignition. The amplifier will not turn on
if this wire is not hooked up to this (or any) switched B+ source!
Step #8: You will see a wire sheath containing blue/black and green/black
wires with two plugs. The plug with the blue/black wires will install into
the factory plug that goes directly into the brake side speaker cabinet.
The plug with green/black wires will install into the factory connector
that originally plugged directly into the brake side speaker cabinet (has
pink/pink black wires).
Step #9: You will see a second sheath with brown/black and yellow/black wires
and two plugs. The plug with the brown/black wires will install into the
factory plug that goes directly into the clutch side speaker cabinet. The
plug with yellow/black wires will install into the factory connector that
originally plugged directly into the clutch side speaker cabinet
(has pink/pink black wires).