Car Cooling Fan Control Circuit

The temperature controlled switch is designed to turn the fan on when coolant temperatures reach 195 degrees and turn off the fan when temps drop to 185 degrees.

Car cooling fan control circuit.

The electric cooling fan uses a direct current dc electric motor with a thermo switch module or computer control to turn it on or off depending on coolant temperature or ac operating condition. A switched terminal will be hot only when the key is on. Get the 10 gauge wire and place it through the hole in your fire wall. A constant power supply from the battery is present on a terminal in each of the relays.

The fan relays are nothing but a remote light switch. The vehicle s pcm s function is to act as a ground to operate components not to supply power. The engine may also overheat if fan speed fails to increase when additional cooling is needed. Engine cooling fan issues.

During the install christian shot. The vehicles ecu has tried to control the cooling fan 1 and it has failed to operate or a fault was detected. The ecu then triggers a check engine light to illuminate on the dashboard. On older fan circuits the thermostatic switch connects to battery power on one side and to the fan motor on the other.

What causes the p0480 code. The fan may work but it only runs at low speed. Now take the power wire from your fan and connect it to the wire that is going through the firewall. Which may not be fast enough to prevent overheating.

Because it can allow the engine to overheat. So now we have a wire that goes through the engine bay to the cabin of your car. On applications that have variable fan speeds. This will be the wire that connects your switch to your fan power wire.

P0480 means that the cooling fan 1 control circuit has a malfunction.