I have a 2007 grand caravan 3.3. The van overheated the other day to find out the fans aren't working. Cracked rad from incident been replaced. I tested fans with direct line to battery, they still work. I replaced the temp sensor located behind the coil. I also replaced fan relay located in front of rad on bumper. Is there another temp sensor? A friend told me there should be one near the water pump. Can't see anything from under unless i am blind. Anyways the fans still don't turn on. HELP ME PLEASE

 

I had a problem much like this...well exactly like this...and my son had it also on his caravan. His and mine both turned out to be the fan control module. Our's (1997 and 1998) are located on the drivers side frame member under the air intake stuff. We replaced his and it has worked fine for several years so far. However when mine went last year, I replaced the module and the fans still did not work. Being paranoid by nature, I borrowed the module from my son's caravan and the fans worked! I put the new module in his and it did not work. Sure enough we had a brand new after market that was dead on arrival. We replaced the bad module with another of the same brand and the fans worked...for a month. Then that module failed. I borrowed my son's module again and sure enough the fans worked. At this point I did some ammeter checks and everything seemed fine when I compared the two cars. So, I replaced my module again with a different brand after market unit and it has worked fine for a year now. Perhaps your module was from the same lot as mine was.

 

Two and only two sensors tell the PCM to turn on the fans - the ECT sensor which you've changed and the A/C pressure transducer. If neither engine temp nor turning on your A/C will turn the fans on the likely culprit is the PCM since you've already changed the fan relay (Phil could be right). Verify the command wire from the PCM to the fan relay is good before forking out the cash for a PCM.

 

"Cracked radiator from incident"......Front ender? A lot of times when you have a front ender, the wiring to the fan module gets cut. Might want to check that before throwing more money in parts.

 

Yes my wife had a minor ding in the front end. I will double check the wiring. Plus i had a friend tell me that he googled it and he said could be a glitch. It says to disconnect the batt and let it sit a few mins and try again. I am just about willing to try anything at this point.

Thanks to all for possible solutions i will post what i find.

 

Ok so i still couldn't figure out anything. I hard wired the fans to the battery with a toggle switch and at least the fans run so it can be driven. I think i gonna have to take to the shop and get it looked at by a pro.