Join Date: Sep 2010
Location: So Cal
Vehicle: 99 Dakota Extra cab 5.2
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Something else to check: There is a thermostat switch(usually screwed into a coolant area) sorry I dont know where it is on your truck. This switch senses the high temp of coolant and switches on/off the fan. IF you find it, you can test it with boiling water & a V.O.M.
Did a little research(should have done it before I opened my mouth)
On the Dakota(and others Im sure) The electric radiator cooling fan is controlled by the Powertrain Control Module (PCM) through the radiator cooling fan relay. The PCM will activate the relay after receiving inputs from the engine coolant temperature sensor and/or an air conditioning on/off signal.
Last edited by renzo; 09-10-2010 at 05:14 AM.
Reason: Activated mouth before engaging brain