Harley-Davidson 18-Pin Motorcycle Wire Harness Connector – OEM 1-2112757-1 | Male & Female | BN600

The OEM 1-2112757-1 is an 18-pin connector used in Harley-Davidson motorcycle main harness assemblies. The TE Connectivity part number 1-2112757-1 identifies this as a BN600-series connector used in Harley-Davidson’s Touring, Softail, and Dyna platform harnesses. The 18-pin configuration consolidates multiple electrical circuits — ignition, lighting, instrument, and accessory circuits — into a single main harness connector. Available in Male and Female variants, bare or with 15cm pre-wired leads.

Key Specifications

• OEM Part Number: 1-2112757-1 (TE Connectivity BN600 series)
• Pin count: 18-pin
• Gender options: Male / Female
• Housing material: Nylon (PA66)
• Available as: Bare connector or 15cm pre-wired leads
• Application: Main harness connector
• Compatible brands: Harley-Davidson

18-Pin Main Harness Circuit Breakdown

• Pins 1–2: Main power supply (battery positive and ground)
• Pins 3–4: Ignition-switched power and accessory power
• Pins 5–6: CAN bus (H-D CAN bus — ECM to instrument cluster, BCM)
• Pins 7–8: Front lighting (headlight high/low beam)
• Pins 9–10: Rear lighting (tail light, brake light)
• Pins 11–12: Turn signal circuits (left / right)
• Pins 13–14: Instrument cluster power and signal
• Pins 15–16: Accessory circuits (heated grips, GPS, audio)
• Pins 17–18: Ground references (chassis earth, redundant)

Compatible Harley-Davidson Models

• Touring (FLHT/FLHX/FLTR, 2014–present): Street Glide, Road Glide, Road King, Electra Glide
• Softail (FLST/FXST, 2018–present): Fat Boy, Heritage, Breakout, Softail Slim
• Dyna (FXD, 2012–2017): Street Bob, Wide Glide, Low Rider
• Sportster (XL, 2014–2021): Iron 883, Forty-Eight, Roadster

Common Fault Symptoms

• Multiple electrical faults simultaneously (power/ground pins corroded)
• Instrument cluster not powering on
• Lighting faults (headlight, tail light, turn signals)
• CAN bus communication faults (ECM not communicating with instrument cluster)
• Intermittent electrical faults under vibration

Frequently Asked Questions

Q: My Harley has multiple electrical faults after a long ride in rain — is this the connector?
A: Yes. The main harness connector is a common point of water ingress on Harley-Davidson motorcycles. Water wicks into the connector along the wire insulation and causes corrosion on multiple pins simultaneously. Dry the connector, clean with electrical contact cleaner, and replace if corrosion is visible.

Q: Are terminals included?
A: Yes, terminals are included with all variants.