Elite 2500 & 2500 T Premium Universal Wire-in Harness – 3M Length: 3M (9.8′)

The Ultimate Foundation for Custom Engine Management

When building a race car, performing a complex engine swap, or wiring a chassis from the ground up, the electrical system serves as the central nervous system of the vehicle. The Elite 2500 & 2500 T Premium Universal Wire-in Harness (3M Length) is the definitive solution for professional integrators and uncompromising enthusiasts who require a robust, flexible, and completely serviceable wiring infrastructure. Unlike basic flying-lead harnesses, this Premium edition incorporates a fully integrated fuse and relay box, solving the complex problem of power distribution before installation even begins. With a generous 3-meter (9.8-foot) length, it offers the routing flexibility needed for large chassis, mid-engine layouts, or installations where the ECU is mounted remotely from the engine bay.

Engineering Deep-Dive: Materials and Power Distribution

The core of this harness is its integrated power distribution module. In a custom install, creating a reliable fuse and relay center is often the most time-consuming task. This harness comes pre-terminated with a molded Haltech fuse box featuring four relays and seven fuses. This setup handles critical high-current circuits—such as fuel pumps, ignition coils, and injectors—ensuring that the ECU logic remains isolated from voltage spikes and noise. The wiring itself utilizes automotive-grade, cross-linked insulation (TXL/XLPE) which withstands temperatures up to 125°C, resisting the melting and brittleness that plague standard PVC wires in harsh engine bay environments.

The color-coding and labeling on this harness adhere to Haltech’s strict standards, making identification of every wire intuitive. The twisted-pair cabling used for Crank and Cam position sensors provides essential shielding against Electromagnetic Interference (EMI), a critical requirement for maintaining sync at high RPMs. By delivering clean, filtered power and protected signal paths, this harness ensures that the Elite 2500 ECU operates with absolute precision.

Operational Benefits: Versatility for Any Application

The 3-meter length is a strategic advantage for specific builds. In applications like drag racing tube chassis, marine vessels, or rear-engine vehicles (such as Porsche or MR2), the distance between the engine sensors and the cockpit-mounted ECU often exceeds standard harness lengths. This harness eliminates the need for reliable-sapping extensions or splice joints. The user is presented with a set of ECU connectors at one end and unterminated, labeled wires at the engine side, allowing for custom termination to whatever specific sensors (Map, TPS, Temp) and actuators (Injectors, Coils) the build requires. This “Wire-in” nature makes it universally compatible with any engine configuration supported by the Elite 2500, from 4-rotary setups to V12 engines.

Fitment and Installation Scope

This harness is a Universal product, designed for custom applications where a Plug ‘n’ Play loom does not exist. It requires the installer to terminate the engine-side connections manually.

• Target ECU: Haltech Elite 2500 or Elite 2500 T.
• Ideal For: Engine Swaps (LS, 2JZ, RB, Barra), dedicated race cars, marine applications, and full chassis rewires.
• Length Profile: 3.0 Meters (9.8 ft) – Recommended for large vehicles or remote ECU mounting.

Technical Specifications

Summary & What’s Included

The Elite 2500 Premium Harness is the professional’s choice for a clean, reliable, and fused electrical system. It removes the guesswork from power supply wiring, allowing you to focus on terminating sensors and tuning the engine.

Includes:

• Universal Wire-in Harness (3M Length)
• Firewall Grommet
• Moulded Haltech Fuse Box and Lid (6 Power Circuits)
• 4 x Relays
• 7 x Fuses
• Pins for the 2 spare power circuits