Car Cooling Fan Control Circuit

The fan may work but it only runs at low speed.

Car cooling fan control circuit.

Now take the power wire from your fan and connect it to the wire that is going through the firewall. The ecu then triggers a check engine light to illuminate on the dashboard. The fan relays are nothing but a remote light switch. The fan as well as other apparatus draws too much amperage to be safe in the cockpit so it s kept under the hood.

This will be the wire that connects your switch to your fan power wire. Because it can allow the engine to overheat. 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. The engine may also overheat if fan speed fails to increase when additional cooling is needed.

Engine cooling fan issues. A constant power supply from the battery is present on a terminal in each of the relays. P0480 means that the cooling fan 1 control circuit has a malfunction. Which may not be fast enough to prevent overheating.

This one turns on the fan when the circuit is closed. The vehicles ecu has tried to control the cooling fan 1 and it has failed to operate or a fault was detected. Get the 10 gauge wire and place it through the hole in your fire wall. Or a failure of the fan relay or control circuit is bad news.

On applications that have variable fan speeds. 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. During the install christian shot.

The vehicle s pcm s function is to act as a ground to operate components not to supply power.