Essential Connectivity for Simple Builds

The Elite 750 Basic Universal Wire-in Harness is the stripped-down, lightweight wiring solution for the Haltech Elite 750 ECU. Designed for budget builds, simple race cars, or carburetor-to-EFI conversions where the vehicle already has a functional fuse block, this harness provides exactly what is needed—connectivity—without the added cost or bulk of an integrated relay box. It features the same high-quality, automotive-grade wiring as the Premium line, ensuring that signal integrity and durability are not compromised.

Engineering for Flexibility

This harness connects directly to the Elite 750’s single 34-pin waterproof connector. From there, it branches out into 2.5 meters of color-coded, labeled wires. This length is sufficient to reach from the cabin to the engine bay in most vehicles. Because it lacks the molded fuse box, the Basic harness is much easier to route through small firewall grommets or hide inside wire-tuck looms. It is the perfect companion for a simple 4-cylinder or V8 install where the builder prefers to wire their own relays for the fuel pump and fans, or connect to an existing chassis harness.

Note on Safety: Since this harness does not include fuses, it is imperative that the installer routes the main power supply through an externally fused source. Neglecting to fuse the ECU power supply can result in catastrophic damage to the unit in the event of a short circuit.

Fitment and Application

This is a Universal product.

Compatible ECU: Haltech Elite 750.
Application: Basic EFI conversions, simple race cars, existing fuse/relay setups.
Type: Basic (Flying Lead).