Rad Fan Control Relay Circuit

P1491 radiator fan control relay circuit.

Rad fan control relay circuit.

Radiator fan control relay harness is open or shorted radiator fan control relay circuit poor electrical connection how is the p1491 chrysler code repair. The vehicle computer monitors coolant temperature with a sensor located near the thermostat. Refer to code repair chart in other manuals or media. Test the fan relay resistance it should be 30 70 ohms.

Start by checking the possible causes listed above. Each relay will control a single fan and a 30 amp fuse is recommended for each relay connection to the battery. Check for damaged components and look for broken bent pushed out or. Start by checking the possible causes listed above.

Most late model vehicles use an electric fan to pull air through the radiator. As you can see from the diagrams above and below it s really a simple circuit that not only provides the proper connections to control the cooling fans but unlike the switch under the dash method you won t ever have to worry. Should there any problem within the circuit that will cause the fan to fail the engine will heat up causing it to overheat. If you have a p1491 radiator fan control relay circuit trouble code this post will help you understand what it is and how to fix it.

Visually inspect the related wiring harness and connectors. The electric cooling fan is controlled by the powertrain control module pcm through the cooling fan relay based on inputs from the following components. Advance auto parts has 8 different radiator fan control relay for your vehicle ready for shipping or in store pick up. The engine coolant temperature ect sensor the intake air temperature iat sensor the a c selector switch the a c refrigerant pressure sensor the vehicle speed sensor.

With the key on or engine running system voltage over 10v fan relay commanded on the powertrain control module detects a shorted or open condition in the relay control circuit. The best part is our jeep grand cherokee radiator fan control relay products start from as little as 46 99. Check for damaged components and look for broken bent pushed out or corroded. When it comes to your jeep grand cherokee you want parts and products from only trusted brands.