I'm testing a set of fans and the harness before I possibly sell them to another member and I have a question about the blue and green control wires. When I ground the green wire I get both fans on low speed. If I ground the blue wire I get one fan on high speed. When I ground both the green and the blue I get both fans on high speed. Would anyone familiar with these fans be able to tell me if this is correct? Thanks for any help.
Mike

 

That would be correct.

 

That is correct..
It is a Series/parallel circuit with 3 relays and 2 trigger wires.

What you tested was Green wire is Fans #1 (LOW)
Blue wire is Fans #2 (Passenger fan only on high
Both grounded is Both fans on High.

 

Guys I sure appreciate your help with this. Thank you.
Mike