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GETTING STARTED 

Step #1:  Remove the seat, and both wires (+ and -) from the battery.
Step #2:   Remove the outer fairing/headlamp assembly. Refer to a service manual 

if you need help with this. 

Note:

 A towel on the front fender can help 

prevent scratches or “dings” from dropped tools or fasteners etc.  
Expletives will also be kept to a minimum!

Step #3:   Unplug the factory wires at each front speaker. Locate and remove the 

3 torx head screws, and single “speed nut” that holds each speaker 
grill to the bike. The speakers and grills will come off as one unit. 
Put these aside. 

Step #4:   Remove 4 small Phillips screws to separate 5’x7” speakers from new 

grills. Locate the bag of screws in the kit. Using these longer Philips 
screws, install each Hogtunes grill to the bike, and re-install the stock 
“speed nut” on each side. 

DO NOT use the stock screws

 for this, 

or you will damage your inner fairing. Re-install the 5”x7” speakers to 
the grills using the shorter screws just removed, noting that the speakers 
must be oriented so the wire connectors are closest to the radio. 

Step #5:   If installing on a RG Ultra, remove the rear grills and speakers. On any 

other model of FLTR without factory wires already in the rear speaker 
boxes, go to the next step.

Step #6:   Locate the 2ch/4ch switch on the side of the amplifi er. 

 

If installing on a RG Ultra:

 

 

 make sure this switch is in the “4ch”position. In this position, the 
amplifi ers front and rear channels are controlled independently by 
the Road Glide Ultra radios built in fader. 

 

 

For all other models without factory wires already 

in the rear speaker boxes: 

 Put the switch in the “2ch” position. Locate the 3 position switch on the 
side of the amplifi er marked “GAIN”, and start with this switch is in the 
“+3” position.  With the amp in “2ch” mode, the gain switch becomes 
active, and is used to adjust the volume of what ever is plugged into the 
rear channels. This is ideal for “Non RG Ultras” where there is no fader. 
The gain switch allows the rear speakers to be adjusted versus the 
fronts, and acts as a quasi “set it and forget it” fader.

3

4

Step #7:  The power harness has an 8 pin white plug with 3 red wires, 3 black 

wires, and 1 orange wire. Locate this and plug it into the white socket 
on the amplifi er marked “power”. The input harness has a smaller black 
8 pin plug with smaller gauge wire. Plug this into the black socket on the 
amplifi er marked “hi level input”. Locate the long “rear speaker” harness 
with 8 black wires in it. One end has a white 8 pin connector, the other 
end has two 4 pin connectors. 
-      

If mounting in a RG ULTRA:

 One of the 4 pin connectors on this 

long harness will plug into the empty 4 pin plug on the input harness. 
It will only go on one way. 

 

-   

  If mounting on any other model of RG:

 the white plug on 

the rear harness that fi ts the empty white plug on the input harness 
does not get plugged in. Let it hang. The other 4 pin plug on the rear 
harness will plug into the “rear out” which is a white socket on the 
other side of the amp. Locate the 4 pin black plug with black/brown, 
and black/blue wires. This will plug into the “front out” on the amp, 
which is a 4 pin black socket. Note: There is a blue socket on the amp 
labeled “bypass out”. This carries the radios built in power (front 
channels) and although not used in this kit, is there for future system 
expansion. 

Diagram 1.1 (Amp mounts to brake side of inner fairing “behind” glove box)

The amplifi er on its plate is designed to mount on the brake side of the fairing as 
show in Diagram 1.1 above. Apply one side of the supplied “hook and loop” 
adhesive to the back of the amp plate. The other side will attach direct to the 
fairing inner. Line the plate up as shown in Diagram 1.1 and set the amp/amp 
plate in place by joining both halves of the hook and loop adhesive together. 
When re-assembling the fairing to the bike, the bolts that hold the front turn signal 
in place will secure the plate in place, even though the adhesive does most of the 
work. 

Note: Most adhesives work best on clean surfaces and at room temperature! 

AMPLIFIER

PLATE

BRAKE 

SIDE INNER 

FAIRING

GLOVE BOX

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