I am doing an electric fan conversion on my 2009 silverado 2500HD. I am using factory GM dual fans from a 2008 silverado 1500 with a tow package.
I have identified pin 17 and pin 58 for low and high fan control in the ECM. I have a harness from LS1fans.com although I'm not sure I need it.
The fans installed perfectly, the harness works great but I have no fans... they do not come on at all.
if I put either lead, high fan or low fan to ground the fans work perfectly but installed in the harness to the ECM nothing.
Does anyone have experience with what I'm doing on a late model chevrolet, 2007 up?
Does anyone have a screen shot of a file that tells me what to turn on and what settings need to be turned on? The truck does not come with fans stock but seems to have everything on the ECM.
thanks in advance.