E31 P2 No Relay Econo Output Harness

(Replaces E26 & E21 – No Relays or Diodes Included)

The E31 P2 No Relay Econo Output Harness is part of the Level 1 economy series and serves as a replacement for the E26 and E21 harnesses. It provides all ECU/TCU connections via a 10-way connector, supporting most engine and transmission configurations.

⚠️ Note: This harness does not include relays, diodes, or fuse boxes. These components must be added separately for circuit protection and to guard against inductive voltage spikes. Refer to the manual for relay numbers and power wiring details.

Compatible ECUs

• Orion2

• Orion

• Saturn

• Pluto

• Venus

• Titan

Key Features

• 4x High Voltage Negative Drivers (Striped Black)
  Used for basic coils or high-voltage applications

• 4x Standard Negative Drivers (Striped Black & Blue)
  Ideal for injector drivers and general outputs

• 1x Mechanical Relay Output (Blue/Black)
  Supports up to 2 mechanical relays

• 1x RPM Output (Green)
  Provides RPM signal for tachometers

Installation Notes

• Power wiring is not included – Add relays, fuses, and diodes externally

• Relay numbers must match the drawing – Refer to the product manual

• Use the GP Priority layout for correct wire colours

• Design drawing available – Confirms wire thickness and lengths

• See product manual for wiring diagrams for each compatible ECU

• Isolate all unused wires to prevent shorts or interference

This harness is a cost-effective solution for basic ECU/TCU output requirements, ideal for applications where flexibility in relay and protection layout is preferred.