Why does radiator fan relay fail?
When the radiator fan relay fails on a vehicle, it can quickly overheat due to the lack of cooling. The fan is designed to kick on at specific temperatures controlled by the relay.
upper rear right corner of the radiator and/or attached to the radiator hose. If it has an electric cooling fan in front of the radiator, the relay is a black rectangular 4 pin located on the bracket next to the left shock tower. If you are asking about a relay for the blower fan in the car, there is no relay
The relay is more likely to fail than the fan. Easiest way to check is to disconnect the electrical connection to the fan and hook it up to two substitute wires ... one to the battery and the other to a ground. If the fan runs, you know it works, so your problem is either in the relay, the wiring, or a temperature sensor.
I am the one who asked this question. After two 2 days the radiator fans failed to come on. The fan relay was defective and I replaced it. Advice; if your radiator fans run continuously (more then 20 min) after the engine is turned off, highly consider buying a new fan relay. That is what I did and when the fans stopped working I had the part handy. The radiator fan relay fan relay is…