4-Pin Sumitomo Waterproof Connector – Small Current OEM 6185-5424 / 6188-5814

Direct-fit replacement for Sumitomo part numbers 6185-5424 (female housing) and 6188-5814 (male housing), a 4-pin IP68 waterproof connector set used for small-current sensor, actuator, and body harness connections. The Sumitomo 6185/6188 series is widely used across Japanese OEM platforms for low-current signal and sensor circuits.

Key Specifications

• OEM Part Numbers: 6185-5424 (female) / 6188-5814 (male)
• Pin Count: 4
• Gender: Male & Female set (with wire)
• Wire Gauge: 20 AWG (0.5 mm²)
• Wire Length: 5.5 inches (140 mm)
• Waterproof Rating: IP68
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 5A per pin (small current / signal circuits)

Sumitomo 6185 vs 6188 – Female vs Male Naming Convention

In Sumitomo part numbering, 6185-xxxx = female housing (socket side) and 6188-xxxx = male housing (pin side). This convention is consistent across the Sumitomo waterproof connector series used on Honda, Toyota, Nissan, and Mazda platforms.

Pin Assignment Reference (4-Pin Sensor)

Compatible Applications

• Honda / Toyota / Nissan / Mazda: Sensor harness connectors – O2 sensor, TPS, MAP, coolant temperature
• General: Small-current actuator and body harness connectors requiring IP68 sealing

Diagnosis – Common Faults

• Intermittent sensor codes after rain: Inspect wire seal integrity – moisture ingress causes intermittent open-circuit faults
• High contact resistance: Measure with milliohm meter; >0.5Ω indicates terminal corrosion – replace connector assembly

FAQ

Q: Is 6185-5424 the male or female connector?
A: 6185-5424 is the female (socket side); 6188-5814 is the male (pin side). This follows the Sumitomo 6185/6188 naming convention for female/male housings.

Package Contents

1 × 4-Pin Male Connector (6188-5814) + 1 × 4-Pin Female Connector (6185-5424), each with 20 AWG wire and terminal insert