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7123-7780-40 / 7157-7789-60 Automotive 8-Pin Waterproof Connector — S13 Lower Transmission Wiring Harness Plug
7123-7780-40 / 7157-7789-60 Automotive 8-Pin Waterproof Connector S13 Lower Transmission Wiring Harness Plug
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7123-7780-40 / 7157-7789-60 Automotive 8-Pin Waterproof Connector — S13 Lower Transmission Wiring Harness Plug
Transmission wiring harness connectors operate in one of the most demanding environments in any vehicle — exposed to automatic transmission fluid, extreme heat cycles, and constant vibration from the drivetrain. The 7123-7780-40 / 7157-7789-60 8-pin waterproof automotive connector is engineered to meet these demands, providing a sealed, OEM-specification electrical connection for S13 lower transmission harness circuits and related automotive wiring harness applications.
With a sealed IP-rated housing and tin-plated copper alloy contacts, this connector maintains low contact resistance and corrosion resistance across the full service life of the transmission. Whether you're restoring a Nissan S13 platform, repairing a transmission control module harness, or fabricating a custom drivetrain wiring loom, the 7123-7780-40 / 7157-7789-60 delivers the dimensional accuracy and sealing integrity of the original OEM part.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Numbers | 7123-7780-40 (female) / 7157-7789-60 (male) |
| Pin Count | 8 pins |
| Connector Type | Waterproof automotive transmission harness connector |
| Primary Application | S13 lower transmission wiring harness |
| Sealing | Sealed / waterproof (wire seal + housing seal) |
| Housing Material | PA66 glass-filled nylon |
| Contact Material | Tin-plated copper alloy |
| Certification | CE |
| Origin | Mainland China |
Key Features
- ✅ Sealed waterproof design — wire seals and housing seal prevent ATF, water, and contaminant ingress into the connector cavity; critical for transmission and underbody harness applications
- ✅ OEM part numbers 7123-7780-40 / 7157-7789-60 — direct-fit dimensional match for S13 lower transmission harness connector positions
- ✅ 8-pin configuration — covers multiple transmission control, solenoid, and sensor signal circuits in a single compact connector body
- ✅ PA66 glass-filled nylon housing — rated for continuous exposure to ATF, engine oil, and high under-transmission temperatures
- ✅ Tin-plated copper alloy contacts — low contact resistance for clean solenoid and sensor signal transmission; resists oxidation in fluid-exposed environments
- ✅ Positive locking latch — audible click confirms full engagement; prevents accidental disconnection from drivetrain vibration
- ✅ CE certified — meets European automotive electrical component standards
Common Applications
- Nissan S13 lower transmission wiring harness connector repair and replacement
- Automatic transmission control module (TCM) harness connector repair
- Transmission solenoid and speed sensor wiring harness fabrication
- Custom drivetrain and gearbox wiring harness construction
- Automotive restoration and harness repair for S-chassis Nissan platforms
FAQ
Q: Is this connector compatible with the Nissan S13 transmission harness?
A: Yes. Part numbers 7123-7780-40 and 7157-7789-60 are OEM-specification references for the S13 lower transmission harness connector. Verify the part number against your vehicle's harness before ordering.
Q: Are wire seals and terminals included?
A: Inclusion of wire seals and terminals depends on the variant selected. Complete kits with OEM-specification crimp terminals and wire seals are available — check the product options before adding to cart.
Q: What wire gauge is compatible?
A: Compatible with 0.5–1.25mm² (AWG 20–18) automotive wire, consistent with transmission sensor and solenoid circuit wire gauges.
Package Contents
- 1× 7123-7780-40 / 7157-7789-60 8-Pin Waterproof Automotive Transmission Connector (male plug or female socket as selected)
- Wire seals and crimp terminals included in complete kit variants
