This diagram shows how the Premium Universal Wire-in Harness for the Elite 550 is laid out: which harness wire goes with which ECU function, so you can route and terminate each one with confidence. It is the reference you work from when your harness came with the Elite 550 Premium kit or the 2.5 m (8 ft) version.
Keep it beside you while planning the install, before cutting any wire to length, and again when assigning inputs and outputs in ESP. Before first power-up, check that every sensor and output is on the pin the software expects, that every power feed is fused, and that the engine and ECU grounds are solid.
If you have the Basic harness instead, use the Basic harness diagram. Pin-by-pin details are in the Elite 550 complete pinout, and the Elite 550 overview covers the ECU itself.
Need this diagram? Ask us and we'll send it over with advice for your build.
