Dodge Durango Electric Fan

Backed by over 50 years of car parts experience fix it once and fix it right with four seasons.
Dodge durango electric fan. This is an ffd extreme electric cooling fan conversion kit with billet aluminum fan shroud for 1998 2003 dodge durango. Any thoughts as to why my electric fan would not be working. Dodge durango 2000 electric fan kit by four seasons. If the radiator fan is not working it s a serious problem.
I assume the fan may have gone bad. I have replaced the relay in the pcm and it did not resolve the issue. Just because the radiator fan is not on does not mean that it is not working. I want to moditfy the temp controller to turn on also when the pcm tells it to turn on.
I m thinking i d like to pull the factory electric fan and the fan clutch assembly. All products are engineered and tested to provide years of trouble free operation. This system uses ff dynamics hand built and hand tig welded billet aluminum fan shroud system with the new extreme ffd cooling fan rated at over 3500cfm for the system. Thanks for your help.
I want to know how the pcm turns on the ac fan and where what wires. 2001 durango 4x4 5 9l towing package.