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Hi,
The cooling fans in these vans are controlled by the engine computer, which controls 3 different relays to turn the fans on at low and high speeds. There are also a couple of fuses that supply power to the fans.
So you have a few things to look at. The relays and fuses are all located in the fuse box that is under the hood. I would start there, using a multimeter to check for power at both sides of each fuse. There should be a label inside the fuse box that will help you locate which fuses to test and which relays are used for the fans.
I have provided a link that describes the system and shows how the system is energized when the fans are on low and high speeds.
Good Luck, Greg
What else can I help you with?
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