They should come on when the ac high side pressure exceeds 150lbs. And it should come on when the temp exceeds 209 degrees cent.
A shop with a scan tool can monitor these operations and see if the pcm is commanding them on to verify the pcm sees the commands.
Not as simple as replacing any parts till you see what is being told to the fans by the computer.
Thursday, July 19th, 2012 AT 2:29 PM