DESCRIPTION
The dual radiator fans are mounted to the back side of the radiator . The radiator fan consist of the fan blade, electric motor and a support shroud which are all serviced as an assembly.
OPERATION
COOLANT TEMPERATURE
A/C PRESSURE
TRANSAXLE OIL TEMPERATURE
Fan Operation Speeds:
Initial
Max
Initial
Max
Initial
Max
Fan On:
104°C (220°F)
110°C (230°F) Fan Speed Duty-Cycles (Ramps-up) from 30% to 99%
1,724 Kpa (250 psi)
2,068 Kpa (300 psi) Fan Speed Duty-Cycles (Ramps-up) from 30% to 99%
96°C (204°F)
111°C (232°F) Fan Speed Duty Cycles (Ramps-up) from 30% to 99%
Fan Off:
101°C (214°F)
Fan Speed Duty-Cycles (Ramps-down) from 99% to 30%
1,710 Kpa (248 psi)
Fan Speed Duty-Cycles (Ramps-down) from 99% to 30%
89°C (192°F)
Fan Speed Duty Cycles (Ramps-down) from 99% to 30%
I looked radiator fan, if that is the issue. The radiator fan won't even come on till about 220 degrees f and the speed cycles. If you got a code, We need the code number?
P1491
My info for that code, talks about fan relay. It says to check resistance across relay circuits, it says 30--70 ohms. There are two sides to relay, load side and control side.
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What fans?
Testimonial: "Radiator fans"
Radiator fans
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SOURCE: No power to fans in 96 Dodge Grand Caravan
How did you know that relay is bad? What about temperature sensor? BTW, what engine do you have?
SOURCE: radiator fans not working 1998 dodge caravan
First thing I would check is the fuse or the fan relay, located in the power distribution box under the hood. If that's not the problem, then I would find the coolant temperature sensor, unplug it with the key on and the fans should run.
Did you replace the sensor by the thermostat in the engine block or the one under the drivers headlight, There are two, the one next to the thermostat controls the temp gauge in the vehicle. the one under the headlight assembly controls the actual fans and is a electronic module. You have to remove the head light assembly to get to it.
Joe
SOURCE: I replaced my radiator cooling fan motors both of
check for battery power at pin 4 of rad fan relay connector..ground at pin 1..jump pins 3 and 4..fans should work..if not,check harness about 3-4 inches away from relay connector..have seen these corrode..if fans work,the engine controller may not be grounding relay..any codes in engine controller?engine light on?
SOURCE: 2003 dodge caravan 3.3l v6 overheating
check cooling fan relays,also make sure all air is bled out of coolant system,,,replace coolant sensor
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