What this diagram is for
This is Haltech's wiring diagram for the short harness that plugs into the Elite 2500's 26-pin main connector. It shows which wire comes from which pin and what each one is for, so you can connect the harness to sensors, coils, the throttle body and CAN devices on your engine.
You'll want it when you're building a custom loom from the short harness, extending one, or tracing a fault back to the ECU plug.
What to check before wiring
- You're working from the 26-pin diagram, not the 34-pin short harness diagram.
- Each wire's color and function match the 26-pin main connector pinout.
- Trigger, knock and CAN circuits stay shielded or twisted all the way to the sensor.
- Inputs are assigned in ESP before you connect sensors, so pull-ups and functions match the wiring.
For the full-length version, see the 26-pin Elite 2500 harness page.
Need this diagram? Ask us and we'll send it over with advice for your build.
