ECM Code Issue

[franklin2]

Haven't found pin numbers yet, but have found wire colors.

Yellow is battery power coming directly from a fusible link

Darkblue is battery power leaving the relay, this goes to another fusible link and then it changes to red to feed all the 12v electrical for the fuel injection system.

Red/lightgreen comes from the ignition switch, and goes to the coil of the relay

Black/lightgreen is the ground for the coil of the relay. This wire goes to a splice and then heads for that important ground that goes to the battery negative directly.

 

[franklin2]

From what I can tell so far, the two smaller terminals, 1 and 2, are the relay coil. The larger terminals, 3 and 4 are powering the fuel injection system.

If you are putting your meter on ohms and poking around without the power connected, you will get all kinds of readings.