Nexus LS 2 Pin Yazaki Alternator Harness Length: 200mm

Charging System Integration: Nexus LS Yazaki Alternator Harness

Integrating a modern alternator into a standalone engine management system requires precise wiring to ensure proper excitation and voltage regulation. The Nexus LS 2 Pin Yazaki Alternator Harness is a specialized adapter designed to bridge the Haltech Nexus Universal V8 Terminated Harness to GM LS-series alternators utilizing the Yazaki 2-pin connector. This 200mm terminated lead eliminates the guesswork of wiring the alternator’s regulator circuit. It comes pre-fitted with a 470-ohm resistor inline, which is critical for simulating the factory charge warning lamp. Without this resistor, many LS alternators will fail to excite (turn on) or will default to a low-voltage fail-safe mode, resulting in a dead battery and poor system performance.

Engineering & Construction

The harness features a high-quality, OEM-style Yazaki 2-pin connector that clicks securely into the alternator’s regulator port. The wire leads are terminated to interface directly with the Haltech Universal V8 harness system. The integrated 470R resistor is heat-shrink protected and robustly mounted to withstand engine bay vibration. The wire itself is automotive-grade TXL, rated for high temperatures and resistance to oil and fuel. This plug-and-play solution ensures that the ECU sees the correct voltage signals and that the alternator receives the necessary excitation current to maintain a steady 14+ volts under load.

Operational Benefits

• Plug-and-Play: Connects directly to the Nexus Universal V8 harness infrastructure.
• Integrated Resistor: Built-in 470R resistor ensures proper alternator excitation without custom wiring.
• OEM Fitment: Yazaki connector matches factory LS alternators perfectly.
• Reliable Charging: Prevents low-voltage issues associated with incorrect regulator wiring.

Fitment Guide

Designed for LS engines with Yazaki 2-pin alternators used in conjunction with the Nexus V8 Harness.

• Suits: Haltech Nexus R5 Universal V8 Terminated Harness (HT-186200).
• Alternator Type: Yazaki 2-Pin (Common on various GM LS applications).

Technical Specifications

Summary & Includes

Includes:

• 1 x Nexus LS 2 Pin Yazaki Alternator Harness (200mm).

Note: Only for use with the Haltech HT-186200 Universal V8 Harness.