Hope this helps
by rayzor20 - 11/14/12 5:38 AM
In Reply to: 2000 jeep grand cherokee laredo wanting to overheat by azjeepgirl
It is very interesting that everything has been replaced except for your radiator fan and the relay that controls the fan unit.
A mechanics shop should be able to tell you if your fan is working by using a 6 volt latern battery and some speaker cable.
If the fan works then it is your relay that controls the fan that might have died. Link below
I replaced both in my jeep and overheating disappeared. Bought the repalcement fan from Ebay and fan relay from Oreilly's.