8-Pin 1.8mm Unsealed Male & Female Connector – Motorcycle Harness AMP 174931-1 / 1-173850-1

Direct-fit replacement for AMP/TE Connectivity part numbers 174931-1 (male housing) and 1-173850-1 (female housing), an 8-pin 1.8mm pitch unsealed connector set used in motorcycle ECU sub-harness, instrument cluster, and body control signal circuits. The 1.8mm pitch provides a balance between high pin density and reliable terminal contact for multi-function motorcycle harness applications.

Key Specifications

• Part Numbers: 174931-1 (male) / 1-173850-1 (female)
• Pin Count: 8
• Gender: Male & Female set (with wire)
• Terminal Pitch: 1.8mm
• Wire Gauge: 22 AWG (0.3 mm²)
• Wire Length: 5.5 inches (140 mm)
• Sealing: Unsealed (interior / protected harness location)
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 3A per pin (signal circuits)

Pin Assignment Reference (8-Pin ECU Sub-Harness)

Note: Verify pin assignment with motorcycle-specific wiring diagram before installation.

174931-1 vs 1-173850-1 – Male vs Female

174931-1 is the male plug (pin side); 1-173850-1 is the female receptacle (socket side). Both are required for a complete mated connector pair.

Compatible Applications

• Honda / Yamaha / Kawasaki / Suzuki: ECU sub-harness, instrument cluster, and body control signal connectors

Diagnosis – Common Faults

• Intermittent ECU fault codes: Inspect 1.8mm terminal contact pressure – terminals are prone to spread from vibration, causing intermittent open-circuit faults
• No signal from speed or TPS sensor: Check terminal insertion depth – a partially inserted terminal makes intermittent contact

FAQ

Q: Is 174931-1 the male or female connector?
A: 174931-1 is the male (pin side); 1-173850-1 is the female (socket side). Both are included in this listing.

Package Contents

1 × 8-Pin Male Connector (174931-1) + 1 × 8-Pin Female Connector (1-173850-1), each with 22 AWG wire and terminal insert