Nexus LS 4 Pin Delco Alternator Harness Size: 200

Charging System Integration: Nexus LS Delco Alternator Harness

The Nexus LS 4-Pin Delco Alternator Harness is a dedicated adapter designed to seamlessly integrate GM’s 4-pin alternators (CS130D, AD230, AD244 families) into the Haltech Nexus Universal V8 Terminated Harness. These 4-pin Delco style alternators are ubiquitous on LS truck engines and many passenger cars. However, they require specific wiring to the “L” (Lamp) and “S” (Sense) terminals to function correctly in a swap application. This 200mm adapter harness takes care of that complexity. It features a built-in 470-ohm resistor on the excitation circuit, simulating the factory dashboard charge light. This ensures the alternator’s internal regulator activates correctly upon startup, preventing charging system failures and protecting the battery from under-charging.

Engineering & Construction

This harness utilizes a genuine-style Metri-Pack/Delco 4-pin connector with a weather-tight seal, ensuring a corrosion-free connection to the alternator. The 200mm leads are terminated to match the specific breakout on the Nexus Universal V8 harness (HT-186200), making installation a simple click-in affair. The wiring is protected by high-temperature sleeving to survive the harsh environment near the cylinder heads. By utilizing the specific resistor circuitry required by GM regulators, this harness guarantees that your alternator outputs the correct target voltage commanded by the internal regulator.

Operational Benefits

• Plug-and-Play: Interfaces directly between the alternator and the Nexus V8 harness.
• Excitation Logic: Integrated 470R resistor ensures reliable alternator startup.
• OEM Fitment: Fits standard GM 4-pin oval/square alternator connectors.
• Durability: Weather-sealed connector and high-temp wire construction.

Fitment Guide

Designed for LS engines with Delco 4-pin alternators used with the Nexus V8 Harness.

• Suits: Haltech Nexus R5 Universal V8 Terminated Harness (HT-186200).
• Alternator Type: Delco 4-Pin (CS130D/AD244 style).

Technical Specifications

Summary & Includes

Includes:

• 1 x Nexus LS 4 Pin Delco Alternator Harness (200mm).

Note: Refer to the installation guide for specific pinout information if custom terminating. Only for use with HT-186200.