High Speed Engine Cooling Fan Relay

The relay will usually be activated once it is detected that the vehicle s temperature approaches excessively high temperatures.

High speed engine cooling fan relay.

In the 07 12 model the high speed relay was behind the driver side headlight. The fan runs mostly at idle or low speed when the engine is at normal temperature. Or a failure of the fan relay or control circuit. It is a bit confusing till you understand what is going on.

When the correct parameters are met a temperature switch or the computer will activate the relay which will allow power to the fans. So a engine cooling fan failure. The cooling fan relay takes the low voltage signal and internally switches the relay â œonâ to allow battery voltage to be supplied to the radiator cooling fan. The new relay setup is a dual relay and i found the one that i needed to replace was on the left of the two closest to the cab.

While monitoring the cooling fan the ecm detected a high speed condition. A larger radiator a larger clutch fan and a shroud would probably keep your engine cool. The relay controls when the fan turns on and off based on coolant temperature. Using a mechanical fan for a high horsepower application can work just fine if a couple of things are considered.

I hope this video will. When the correct parameters are met a temperature switch or the computer will activate the relay which will allow power. If the cooling fan is spinning beyond or below the manufacturers set parameters the engine light or malfunction indicator lamp mil will be illuminated by the ecm. Most fans should come on when the coolant reaches about 200 to 230 degrees.

Related engine cooling fan diagnostic codes. In the 2012 the relay was relocated next to the master cylinder along the driver side of the engine bay. Usually use a cooling fan. The cooling fan relay is the relay that controls the engine s cooling fans.

When the fan is on too often or won t come on at all a new relay may be the solution. Mechanical fans can sometimes work better than electric fans. The cooling fan relay is the relay that controls the engine s cooling fans. The function of the cooling fan relay is to convert a low voltage signal from either the electronic control module ecm or a thermostatically controlled sensor.