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I assume you mean engine cooling fans. The primary fan is bolted to the water pump and turns with the engine-always runs. The other fan is for when the engine begins to overheat. the coolant temp. sensor triggers it at high temp. You'll hear it kick in. My 1.8L Suby's have rarely utilized this electric fan. Be careful looking around under the hood. Both fans are right there on the front and ready to hurt you. If your car is overheating and this secondary fan has not come on, then it's not working. But you should look deeper to find out why the overheating is occurring-this fan is for "normal" overheating;long steep climbs etc.
For many of the 90's and 2000's Toyota various models - Camry, Tacoma, 4 Runners, Corolla, and some other models it is usually caused by temperature sensitive fan switch on the radiator not operating. Electric fan on the radiator should operate when temp above 200 degrees. Less often the control relay 90987-03003 is defective. Check if bubbling in the radiator smells like exhaust. That would indicate a blown head gasket. A jumper wire from your marker light positive to the lower contact in the fan control relay socket will operate your fan when parking lights are on. The larger vehicles with more powerful radiator fans will need a hefty jumper from a headlight positive to avoid overheating the lighting wiring. Make sure the engine is off and warmed up to check the radiator core with your hand to see if it is getting circulation. If it is all cold the thermostat might be stuck.
Hi,
Please check your fan relay and sensor for malfunction. Otherwise you can by bass the the fan power to prevent your car overheating.
Your car will get overheating if fan does not work of course.
Regards, Jay
well first you will need to hard wire the fan to the battery to determine if the fan is good. then You will need to check the fuse/relay for radiator/AC fan. after that if necessary, check the engine coolant temperature sensor, could be faulty, this sensor tells the computer when the engine is hot enough to turn the fans on
sounds like the thermo fan check that the fan fuse is ok then i cant remember if that model used a relay or not but if it did you will need to check the relay aswell.
cheers
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