2001Jeep Grand Cherokee electric engine cooling fan wont turn off

If the coolest was low it is going somewhere. If you filled the radiator and immediately heard tapping it could be coolent hitting fan or even a blown headmaster. It is possible the coolent and tapping aren't related at all and your oil is low.

It is possible that there is a bad temperature sensor. Have it put on a diagnostic machine and possibly reset all codes.

Replace fan relay
$45 DIY
check out http://rigs.corequipment.com/cebby_WJsite/cooling.htm#relay

the relay is maybe sticking.
or there is a call for cooling when the engine is off.

if the fan turns off after a min or two then its ok.

if the fan stays on and will not trun off ever even after 30 mins then the relay is staying on and needs to be taken out and replaced.

The fan thermostat or relay is probably shot.Trace the wiring from the rad to the engine block to a longish brass nut (the thermostat can be returned as its non-electrical if that's not the problem) The relay i cant help you with.

The sensor is located on the left side of the engine,
below the exaust manifold. Hope this helps.

give these websites a try www.alldatadiy.com and www.autozone.com if all fails stop by your local Jeep dealership in the parts department and they be able to print you off the pictures and diagrams you will need wish you the best of luck Michigan Man.

Likely your fan relay internal contacts have burned closed. Relay should be either in the power distribution center or in front of the battery.

Sounds like a short.