Nexus R5 LSx Non DBW Terminated Harness Injector Connector: EV1

The Ultimate PDM-Integrated Harness for Cable-Throttle LS Swaps

The Nexus R5 LSx Non-DBW Terminated Harness is the pinnacle of wiring solutions for GM LS engine swaps utilizing a mechanical cable throttle body. Unlike standard engine harnesses that simply connect sensors to an ECU, this harness fully integrates the Nexus R5’s Power Distribution Module (PDM) capabilities directly into the loom. This means the harness doesn’t just read engine data; it powers your fuel pumps, cooling fans, and accessories directly from the VCU, eliminating the need for external fuse boxes and relay panels. Designed specifically for the robust LS platform, this version is terminated with EV1 injector connectors, making it a drop-in solution for many early LS1/LS6 applications or builds using high-flow aftermarket injectors with EV1 plugs.

Engineering Deep-Dive: Simplified Power Architecture

Traditional wiring involves a complex web of battery cables, fuse holders, relays, and trigger wires. The HT-186206 consolidates this into a single, cohesive unit. High-current circuits are routed internally within the harness using appropriately gauged, high-thermal-resistance wire. The harness features dedicated high-current outputs (HCOs) capable of driving a fuel pump and thermo-fan directly. This reduces weight, minimizes failure points (like corroded relay sockets), and simplifies the engine bay aesthetic. The harness also includes shielded cam and crank sensor wiring compatible with both Gen III (24x) and Gen IV (58x) trigger patterns, ensuring signal fidelity regardless of the specific LS block used.

Operational Benefits: Complete Vehicle Control

Beyond engine management, this harness provides vehicle control features. It includes breakout connectors for transmission control, allowing seamless integration with 4L60E/4L80E transmissions when paired with the appropriate software configuration. It also features spare inputs and outputs in both the cabin and engine bay, perfect for adding transmission temperature sensors, dome light control, or nitrous activation switches. The integration of dual wideband sensor support allows for precise bank-to-bank tuning, ensuring engine safety under high load.

Fitment and Application Scope

This harness is designed for:

• Engine: GM LS-Based V8s (LS1, LS2, LS3, LQ4, LQ9, etc.) with Cable Throttle (Non-DBW).
• Injectors: Engines using EV1 style connectors (Jetronic/Minitimer).
• Ignition: Requires the OEM GM ignition sub-harness (plugs into the 7-pin coil harness connector).
• Alternator: Includes adapters for 2-pin Bosch, 2-pin Yazaki, and 4-pin Delco alternators.

Technical Specifications

Summary & Includes

The HT-186206 is a total vehicle wiring solution for cable-throttle LS swaps, combining engine control and power distribution into one professional package.

Includes:

• 1 x Terminated Engine Harness (EV1 Injectors)
• 1 x Alternator Adapter Set (Bosch, Yazaki, Delco)
• 1 x DTM/DT Connector Pack for Aux Devices
• 2 x DTP-2 Connectors with 12AWG wire (Fuel Pump/Fan)
• 1 x DT-8 Connector with 18AWG wire

Note: You must retain your factory GM coil harness brackets and sub-harnesses, as this main harness plugs directly into the factory 7-pin coil connector.