Check Engine Light (Mil) not working (LS3)

[vstol]

Rechecked the directions and it says the ECM supplies the ground for the MIL light. It says this circuit requires a 12 v low current light ( have it) and an ignition power source. So does the ECM wire go where the ground is on the light and a 12v power source to the light as well? Thanks

[cpd004]

Originally Posted by vstol

Rechecked the directions and it says the ECM supplies the ground for the MIL light. It says this circuit requires a 12 v low current light ( have it) and an ignition power source. So does the ECM wire go where the ground is on the light and a 12v power source to the light as well? Thanks

This is how mine was wired. One side of light (ground) was supplied from ECM and the other to a switched 12v source that is 12v+ when cranking and running.

[vstol]

Bingo it works thanks