What this diagram is for
The Elite 2500 has two connectors: a 34-pin and a 26-pin. This diagram shows the 34-pin connector's short harness, meaning which circuit each pin carries and how the wires come out of the loom. It's the drawing we reach for when we're extending a short harness into a custom loom, tracing a fault, or confirming a circuit before we add a new sensor or output.
What to check
- Confirm you're looking at the diagram for the right connector. The 26-pin short harness is a separate drawing.
- Check pin numbers against the connector itself, not just wire colors. Some colors repeat on different circuits.
- Make sure shielded circuits, like trigger and knock, stay shielded wherever you extend them.
- Match any spare inputs or outputs you use to the assignments in ESP.
For the full-length harness, see the Elite 2500 34-pin harness article, and the Elite 2500 overview covers the ECU's features.
Need this diagram? Ask us and we'll send it over with advice for your build.
