The GEN1 ME100 and ME221 have the option of plug-in harnesses. The standard connectors are labelled for ease of installation, however, there is also an "Aux" bundle.



The group of red wires should be fed a fused ignition switched live (Fuse with 10A is typical.) The group of Black wires are the grounds and should run to a clean chassis earth.


Please note the assignment tables below do you can us the "Aux" spare wires for other functions.


'Aux' Wire Colour

ME Connection (Pin)

Notes

Brown

Tacho (8)

12V Square Wave Tachometer/Rev Counter Output

Red (black stripe)

O2 Signal (20)

0-5v Analog Input

White

Knock +Ve (24)

Knock Sensor Signal

Blue

Knock -Ve (21)

Knock Sensor Ground

Blue/Black Stripe

Low Side 1 (6)

Typically used to switch Fuel Pump Relay (supplies a ground signal)

Blue/Brown Stripe

Low Side 2 (3)

Spare PWM Low Side

Red/White Stripe

Digital Input 2 (17)

Can be used for VSS

Red/Purple Stripe

Spare Analog 1 (25)

0-5v Analog Input


If you wish to use Digital Input 2 or Spare Analog 1 as Digitial Inputs, note you should install a 10K resistor to 5v as shown in the Spare Analog Guide here.