Kuryakyn Plug & Play Trailer Wiring & Relay Harness – 97-13 Touring Models (Part #7672)

Kuryakyn 7672 Trailer Wiring Harness for 1997–2013 Harley Touring Models

The wiring harness for trailer applications from Kuryakyn provides a convenient plug-and-play solution for select Harley-Davidson motorcycles. The Kuryakyn 7672 Trailer Wiring Harness helps protect factory lighting circuits while providing the connections needed for trailer lights and accessories. The Kuryakyn 7672 Trailer Wiring Harness is designed for 1997–2013 Harley-Davidson Touring motorcycles and provides a safe plug-and-play trailer wiring solution that protects factory circuits from overload.

Look, towing a trailer on a Harley ain't as simple as people think. You get everything hooked up, walk around the trailer checking lights — left turn works, brake lights good, looks fine. Then you're somewhere in the middle of nowhere, maybe 40 miles out, and suddenly your fuses are done. I had a guy come into the shop once, swore up and down his wiring was solid. He'd tapped the trailer straight into his stock turn signal wire. That circuit wasn't built for that. Never was.

These older Touring bikes — '97 through '13 — their factory wiring does exactly one thing: runs the bike's own lights. That's it. Once you start pulling trailer current through those same circuits, sooner or later something gives. The Kuryakyn 7672 Trailer Wiring Harness is built to solve that problem properly instead of just masking it.

Why Choose the Kuryakyn 7672 Trailer Wiring Harness

Here's the actual issue. Harley-Davidson didn't design these Touring models for trailer towing from the factory. The stock lighting circuits were only sized for the motorcycle itself. Add trailer lights into the mix and you can overload the system fast — blown fuses, flickering brake lights, weak turn signals, all the stuff riders end up fighting on long trips.

The Kuryakyn 7672 Trailer Wiring Harness fixes this using a relay-powered design. Your bike's existing lighting circuits only trigger the relay, while the actual trailer lighting power comes directly from the battery. That means cleaner power delivery, safer wiring, and far less strain on the factory electrical system.

If you're looking for a reliable Harley trailer wiring harness, this is one of the cleanest plug-and-play setups available for older Touring bikes.

What's Included & How It Works

Inside the box, the Kuryakyn 7672 Trailer Wiring Harness includes a complete 5-wire trailer output system:

• Running lights
• Brake lights
• Left turn signal
• Right turn signal
• Ground

Everything needed for a standard motorcycle trailer setup is already included.

There's also a bonus fused 12V accessory wire. This separate power wire works great for trailer compartment lights, keyless entry systems, or other small trailer accessories that need independent power.

Most trailers use a standard 4-flat connector, and Kuryakyn includes a 5-to-4 wire converter in the kit. No extra adapters needed.

Installation is true plug-and-play. The connectors are designed to match factory Harley-Davidson wiring plugs exactly. No cutting, no splicing, and no complicated wiring work. Most riders can install the Kuryakyn 7672 Trailer Wiring Harness in about 30–45 minutes using basic hand tools.

Kuryakyn 7672 Trailer Wiring Harness Features

• Relay-based system protects factory Harley wiring
• Draws trailer power directly from the battery
• Prevents overloaded stock lighting circuits
• Full 5-wire trailer output included
• Bonus fused 12V accessory wire
• 5-to-4 flat connector converter included
• Plug-and-play Harley-Davidson connectors
• Designed for 1997–2013 Harley Touring motorcycles
• Ideal Harley Touring trailer wiring solution for towing setups

Kuryakyn 7672 Trailer Wiring Harness Fitment

The Kuryakyn 7672 Trailer Wiring Harness fits the following Harley-Davidson models:

• Electra Glide – 1997–2013 (all variants)
• Road King – 1997–2013 (except 2013 FLHRSE)
• Road Glide – 1998–2013 (except 2009 FLTRSE, 2010–2013 FLTRX, 2012–2013 FLTRXSE)
• Street Glide – 2006–2009
• Trike – 2009–2013
• Softail – 1996–2010 (except 2008–2010 FXCW/C and 2010 FLSTSE)
• Dyna – 1997–2011 (except 2010–2011 FXDWG)

Not sure if your bike is compatible? Contact us before ordering and we'll help confirm fitment.

Frequently Asked Questions About Kuryakyn 7672 Trailer Wiring Harness

Does the Kuryakyn 7672 Trailer Wiring Harness work with any trailer?

Yes. The Kuryakyn 7672 Trailer Wiring Harness works with standard motorcycle trailers using either 5-wire or 4-flat trailer connectors.

Is the Kuryakyn 7672 Trailer Wiring Harness easy to install?

Absolutely. The harness uses factory-style Harley-Davidson connectors, so no cutting or splicing is required during installation.

Will the Kuryakyn 7672 Trailer Wiring Harness interfere with accessory lights?

No. The relay system keeps the trailer wiring circuit isolated from your bike's other lighting accessories.

What is the fused 12V accessory wire for?

The additional fused 12V wire can power trailer compartment lights, keyless entry systems, or other small trailer accessories independently from the main trailer lights.

Do I need an adapter for a 4-flat trailer connector?

No. The included 5-to-4 converter already handles standard flat trailer plugs.

Part Number: 7672
Brand: Kuryakyn
UPC: 191209013769

Fits: 1997–2013 Harley-Davidson Touring Models