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The fan is computer controlled and will not come on untill it reaches 212Deg . It should come on though if you turn on the air conditioning, if not you could have a bad fan relay or relay plug.
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the radiator temperature is broken or cable to it is disconnected ?
if true they are set to run constant the fans to protect the engine from overheating. also check the relay is still seated correctly.
The radiator fan relay is located behind the grill on the driver's side of the vehicle. There is no relay in the distribution box. There is a 40 amp fusible link, however, in that box. The relay (behind the grill) works in conjunction with the coolant temperature sensor, the A/C high pressure switch, the transmission temperature sender and the PCM. This relay will run the fans from 30% to 99% of full speed based on the signal coming from the PCM. This is all according to the official Chrysler shop manuals that I have for my 2005 Town and Country van.
P1491 Radiator fan relay control circuit, Most likely you need a fan relay or fan module.
P1684 Battery was disconnected, this code will not turn on CEL
look behind the drivers side headlite on the crossmember , it looks like a silver module , clean and check the plug , it is corroded 9 out of 10 times , just did this on my 05 t and c , hope this helps
There is not one,it has a blower resister that e\includes the low,med.and if there is one a med-high it is a module,and it has multi wires going to it,and is mounted on the blower box near the blower motor.
If the coolant level (antifreeze) level is low there may not be enough fluid in the system for the temperature sensor to register a proper reading ( think of it as holding an oral thermometer just outside of your mouth).
Insufficient fluid passing through the heater core (small fan that blows through a small heated radiator) may not be enough to produce heat.
However: At increased speeds the engine may be heating what little fluid there is to a point to supply heat to the heater core, and register on the temperature sensor.
If you are talking about the cooling fan relay for the radiator there is no low speed and high speed relay. There is only one relay and it is behind the grill revitted to the bumper rail. It is doesnt look like you typical relay.
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