Question about 2000 Jeep Grand Cherokee

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Radiator overheated and busted open, we bought a new radiator and the fan isn't working , also put a new relay on, and the fan isn't working. What next?

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Did you check the temp sending unit? That tells the computer what the temp is and the computer then triggers the relay. Also, hot wire the fan motor and make sure it runs when it has power.
As far as the radiator "busting open" if it actually did that and didn't just develop a leak, it may indicate a head gasket failure pressurizing the radiator far more than it's normal capacity.

Posted on Jun 06, 2010

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http://rigs.corequipment.com/cebby_WJsite/cooling.htm#relay

Once you switch out the part, you should be golden.

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