Split Backbone Harness Video Overview

This video applies to many versions of our rear speaker wire harnesses and focuses specifically on the split backbone section of the harness. The split backbone is the section that routes from the fairing amplifier area down the backbone of the motorcycle to both saddlebags.

For a full walkthrough and demonstration video visit: WH-SBB Rear Speaker Wire Harness Video

Step 1 — Remove Components

Remove the seat, gas tank, outer fairing, both saddlebags, and both side covers. This provides full access to the motorcycle backbone and harness routing areas.

Step 2 — Connect Amplifier Service Disconnect

Connect the 4-wire amplifier service disconnect to the amplifier rear channel outputs. This creates a quick-release service connection for future maintenance and troubleshooting.

Step 3 — Route Backbone Harness

Route the Y-shaped harness from the fairing area down the bike backbone following the factory harness path. Position the Y-junction near the end of the factory plastic wire channel near the battery compartment.

Secure the harness with zip ties and pull all excess slack forward into the fairing area. Tie the harness to the factory wiring near the neck and frame.

Left Side Routing (Clutch Side)

Route the white and green 2-pin connector around the front of the battery compartment and through the fuse panel area beneath the clutch-side cover. Position the connector near the factory diagnostic connectors.

Step 4 — Route Right Side Harness

Route the red and black 2-pin connector along the brake side of the motorcycle and secure it near the ABS pump area. This prevents excess slack while maintaining safe clearance from suspension and exhaust components.

The saddlebag harness intentionally angles downward and slightly rearward to create a service loop. This allows the saddlebag to be unbolted and leaned away from the motorcycle during future service without stressing the wiring.

Step 5 — Prepare Saddlebag Entry

Drill a 1/2-inch hole approximately 2 inches back and 3 inches up from the bottom front corner of each saddlebag. This creates a clean and low-visibility wire entry point.

Feed the white 2-pin connector through the hole and install the chrome wire cap. Pre-drill 3/32-inch pilot holes before installing the cap fasteners.

Step 6 — Route Wiring Inside Saddlebag

Route the harness around the rear inside perimeter of the saddlebag and forward toward the hinge side of the lid. This keeps wiring hidden while protecting it from cargo damage.

Route the harness underneath the lid tether near the hinge area for a clean factory-style appearance.

Step 7 — Connect Lid Speakers

Connect the lid speaker quick-disconnect pigtails to the saddlebag lid speaker terminals. These quick disconnects allow easy saddlebag lid removal while maintaining correct speaker polarity.