2014+ Plug & Play Front Speaker to RCA Kit with Load Resistor Packs

Kit overview

The WH-PNP-F is designed to pick up the bike’s front speaker signal and feed it to an aftermarket amplifier using RCA-style inputs while retaining a clean, install-friendly connection path. The supplied kit includes the RCA adapter side and the speaker harness leads shown below.

WH-PNP-F harness kit showing RCA connectors and speaker wire leads

Figure 1 — WH-PNP-F harness kit

Tools & parts

Tools required

Wire stripper / crimper
Electrical tape or heat shrink tubing
Digital multimeter
Torx drivers for fairing removal, if needed
Zip ties for harness management, optional

Parts

Included: WH-PNP-F harness kit with RCA adapters and speaker harness leads
Optional / related: WH-BYP-F amplifier bypass harness

Factory amp bikes: If the motorcycle is still equipped with the factory amplifier in the signal path, the WH-BYP-F bypass harness is required to route signal correctly.

The source manual specifically calls out the WH-BYP-F as required on bikes equipped with the factory amplifier.

Installation steps

The factory speaker connection points are outside the fairing enclosures. On Street Glide models they sit low and forward of the enclosures. On Road Glide models they are typically higher, near the radio area.

Motorcycle fairing removed with arrows highlighting factory speaker connectors and radio connection points

Figure 2 — Fairing removed showing front speaker and radio connection points

1

Locate the factory front speaker connectors

Find the left and right 2-pin speaker connectors outside the fairing enclosures.

⌃

Street Glide: look low and forward of the enclosures.
Road Glide: look near the top beside the radio.

Use the rider’s seating position as your left/right reference. When facing the front of the bike, the sides appear reversed.

2

Disconnect each 2-pin Molex speaker connector

Separate the bike harness from each speaker enclosure connection.

⌃

This creates the access point for the WH-PNP-F harness. Work one side at a time so the routing stays obvious.

3

Connect the RCA adapter harness to the bike harness side

Plug the adapter into the motorcycle side you just disconnected.

⌃

Black RCA = left / clutch side
Red RCA = right / brake side

Harley commonly marks the left-side harnesses with orange tape rings. That can help confirm orientation during the install.

4

Connect the 2-pin female leads to the speaker enclosures

Attach the supplied red / black lead side to each enclosure connection.

⌃

This completes the pass-through from the radio side to the front speaker side while giving you the amplifier feed you need.

5

Terminate the front amplifier connections

Strip the unterminated red / black wires and connect them to channels 1 and 2 on the aftermarket amplifier.

⌃

Red = positive (+)
Black = negative (-)

Verify channel assignment before final tie-down. Keep the harness clean and away from sharp edges or pinch points inside the fairing.

Radio flash explained

A radio flash is a software update to the factory Harley radio using the TechnoResearch tool. In the source manual, the purpose is to tell the radio that factory equipment has been removed and aftermarket equipment is now installed.

Enables fader and rear audio outputs that are disabled in stock form.

Activates bass and treble controls even without the factory amplifier present.

Optimizes the OEM EQ behavior for aftermarket amplifiers and speakers.

Reduces signal voltage to better suit amplifiers that accept speaker-level over RCA.

Preserves Harley’s dynamic equalization behavior as volume and road-noise conditions change.

Why it matters: Without the proper flash, audio may distort, tone controls and fader may not work correctly, and the radio can send the wrong signal behavior for the aftermarket setup.

Amplifier compatibility

The WH-PNP-F outputs a speaker-level signal over RCA connectors. Many motorcycle amplifiers are built to accept that directly, but not all are.

How to confirm compatibility

Check the amplifier manual for support of speaker-level input over RCA.
Use a digital multimeter and measure resistance between the outer rings of the RCA inputs. A compatible amplifier should generally show resistance in the thousands of ohms.
If the reading is near zero ohms, the RCA input is likely line-level only and not appropriate for the standard WH-PNP-F connection method.

If the amplifier is not compatible with speaker-level over RCA, use the optional modification method below instead of the normal install path.

Optional harness modification for incompatible amplifiers

This section is not part of the normal installation. Only use it if your amplifier does not support the more common speaker-level-over-RCA input method.

WH-PNP-F harness with cut lines marked and wire cutter icons showing modification points

Figure 3 — Harness modification cut points

Wire color legend showing white left positive, green left negative, red right positive, black right negative

Figure 4 — Wire color legend for high-level input connection

A

Cut off the RCA connectors

Follow the cut locations shown in Figure 3.

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Make clean cuts and leave enough working length to route into the amplifier’s dedicated high-level input pigtail.

B

Remove the load resistor section

Delete the resistor portion exactly as shown in the figure.

⌃

This prepares the harness for direct wire-to-wire connection into the amplifier’s high-level input harness.

C

Match the wires by channel and polarity

Use the color map in Figure 4 before making any final crimps or solder joints.

⌃

White = Left positive
Green = Left negative
Red = Right positive
Black = Right negative

D

Connect to the amplifier’s high-level input pigtail

Extend wires if needed and secure the final splices correctly.

⌃

Crimp or solder all final connections.
Seal with heat shrink tubing or quality electrical tape.
Support and secure the modified harness so it cannot chafe or vibrate loose.

Verification & testing

Power on the radio.
Verify both left and right speakers produce sound.
Confirm amplifier channels 1 and 2 are wired with correct polarity.
Bring volume up gradually and confirm output increases smoothly without distortion.
Confirm the radio has been flashed using the proper American Hard Bag profile.

Polarity reminder: The source manual notes that inside the speaker enclosures Harley uses large terminal = negative and small terminal = positive. If bass sounds weak or hollow, recheck polarity first.

Troubleshooting

Symptom	Likely cause	Recommended fix
No sound	Factory amplifier still in the circuit, or a bypass harness has not been used where required.	Install the WH-BYP-F amplifier bypass harness so signal routes correctly from radio to speakers.
Sound is too boomy or harsh	Radio has not been flashed, or crossover settings are incorrect.	Flash the radio with the American Hard Bag profile and enable a high-pass filter around 130–150 Hz.
Weak bass or hollow sound	Speaker polarity is reversed.	Check amplifier wiring and enclosure wiring. Reconfirm polarity on both left and right channels.

Vehicle fitment

The source manual lists Harley-Davidson touring applications including:

2014-2023 Street Glide, non CVO
2015-2023 Road Glide, non CVO
2013-2023 Electra Glide

Verify exact year and trim compatibility against your product page before publishing. The uploaded manual appears to contain a model-year typo in the fitment line.

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Kit overview