I believe it could be the K40 relay. But before I replace it, I would like to know more about it.

What is the power sorce that activates the k40 relay?

What else does the K40 relay operate?

If I have a problem with my ECM would the K40 relay still work?

If I am not getting spark to the plugs, is that also controlled by the k40 relay or by something else? If so what?

Thanks,
Domenick