Quote:
Originally Posted by nsb29
I have not tried to dissect your drowning but this is how I have have understood the way it works with 3 relays Attachment 1979084
When fan one comes on they are wired in series so that both fans run on 6V When fan 2 is turned on relays 1/2/3 switches switch from 87a to 87 witch then grounds bought fans and turns off 87a on all three relays now both fans receive 12V for high speed |
Yeah but low speed always starts first right? And then it "stays" grounded/triggered when the high speed ground trigger fires giving you full voltage.
So if for some reason your low speed fans are not triggered by the ECM because engine temps are not high enough, and A/C pressure rises too high for some reason, it's only going to ground/trigger the high speed fan which only grounds relay 2-3.
If this is incorrect let me know.
