How do you test a Mercedes fan?
Easiest way to check the fan is turn your AC on max, on lowest temperature on whilst car is running/idling. The fan should start up pretty soon after as gas needs to be cooled through the condenser via the fan when the car is not moving as there is no airflow due to the vehicle not moving.
Where is the coolant fan relay located in a 2001 C320?
My 2001 C320 was overheating. After reading here, and doing some diagnostic work, the fuse was a little burnt. Replaced that, and still no luck. Then I did the A/C trick, and the fan came on, but at slow speed. So I’m guessing it’s the temperature sensor or the relay. Process of elimination, where is the relay?
Where are the fuse panels on a Mercedes Benz?
Here you will find fuse box diagrams of Mercedes-Benz C160, C180, C200, C220, C230, C240, C270, C280, C320, C350, C30, C32, C50 2000, 2001, 2002, 2003, 2004, 2005, 2006 and 2007, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.
Where is the starter motor relay fuse box?
Starter motor relay Fuse box in passenger compartment Mercedes w203. fuse box location. The main fuse box is located in the passenger compartment on the driver’s side of the cockpit. Opening fuse box Open the driver’s door. Pull fuse box cover “1” open with a screw driver or similar tool (see arrow). Remove fuse box cover “1” rearward.
My 2001 C320 was overheating. After reading here, and doing some diagnostic work, the fuse was a little burnt. Replaced that, and still no luck. Then I did the A/C trick, and the fan came on, but at slow speed. So I’m guessing it’s the temperature sensor or the relay. Process of elimination, where is the relay?
Where is the relay on a radiator fan?
The fan relay is often located in the engine bay’s fuse box, but the best way is to check your repair manual to find where it is located. Testing a 4 pin relay is often very straightforward. Remove the relay and give 12 volts to pin 30 and 85. Ground pin 86 and check if there is voltage coming out from pin 87.
Is there a way to test a radiator fan?
You can test the electrical radiator fans by taking a wire from the car battery, unplug the radiator fan connector, and put 12v+ and ground into the connector. This is the fastest and easiest way to test your radiator fans. Because the radiator fan is often drawing so much power, there is often a relay that is powering the coolant fan.
What to do if your ECM power relay is failing?
For this reason, if you suspect that your ECM power relay may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the relay should be replaced. The most popular service booked by readers of this article is Vehicle Engine Electrical Inspection.