I agree that is what confused me. I have had a poke around and it is my newly installed gauges that seem to be the cause of the blower running. I needed to find a switched wire for the gauges to turn on and that seems to be energizing the blower circuit. I guess Engine light was likely caused by a boost spike???? even though I did not see it go over 15 psi. Doing the battery thing. Might leave it overnight and find a new switched wire tomorrow arvo.