Chrysler Repair: 97 dodge caravan 3.3L: no radiator fan operation, powertrain control module, radiator fans

Question
QUESTION: Radiator fans not working replaced the relay and checked the fans still not working , Blower to ac not coming on either maybe two things are connected

ANSWER: Hi Julio,
The relay you replaced has a history of failure so that was a good first step.
Have you checked fuse 24 (40 amp) in the box under the hood?
Have you checked for 12V on the gray wire to the relay which should be there all the time?
Then when you expect fan action (such as asking for AC) are you getting 12V on the dark green wire at the relay and at the fan motors' wires?
Is the black wire on pin 1 of the relay showing a short to ground (which it should as that is the return pathway) and similarly for the black wire at the fan module?
That is the basic circuit. In addition the light green/dark blue wire at the relay should be checked for continuity to pin 73 at the powertrain control module near the battery, which is what activates the relay.
I believe that series of questions will reveal the cause, or it might be the radiofrequency surpressor unit on the fan module proper, but that would be implicated only when you have 12v on the dark green wire at the relay but not at the fan motors wires of the same color.
Roland

---------- FOLLOW-UP ----------

QUESTION: I did get the 12v on the grey wire at the relay, I did not get the 12v on the dark green or the fan motor wires.

Answer
Then the relay is not being turned 'on' by the powertrain controller via the light green/dark blue wire being grounded by the controller or the relay is no good. Check to see what the voltage is on that wire. It should likely by 0V if the controller were grounding it, but you could try touching a ground wire to that wire just for a moment so as to check the relay. I believe if it is 'floating' then the connecting wire to the controller is 'open', if it shows 12v then the controlled is not grounding it.  Are you asking for AC action or if not is the engine running hot enough for the controller to ground that wire? Check the continuity of the light green/dark blue wire between the relay and the ecm.