Why is the radiator fan relay not working?
Why is the radiator fan relay not working?
If you don’t get ground on pin 3, the ECM is not activating the radiator relay. That can be caused by a faulty engine coolant temperature sensor or a wiring problem between the ECM and pin 3. If you do find ground on pin 3, jumper across pins 1 & 2 in the socket. If the radiator fan runs, then the radiator fan relay is bad. Replace it.
How can you tell if a Hyundai radiator fan is working?
If you see battery voltage, that confirms the engine control relay is providing power to the control coil side of the relays. With the key in RUN position, turn the AC ON. Then check for ground on pin 1 in the condenser fan relay socket. If you detect good ground, the ECM is operating properly
What to do if radiator fan doesn’t activate?
If you’ve confirmed the fusible links are good proceed by placing the relays back in their sockets, run the engine at idle and wait for the radiator fan to activate while watching the temperature gauge. If the gauge rises into the danger zone but the radiator fan doesn’t activate, remove the radiator fan relay and check for ground on pin 3.
Why is the fuse on my radiator not working?
It is a very common problem that results in radiator fan failure: the fuse may burn off or simply fall off. You will, though, have to consult the owner’s manual to find out where exactly you can find the fuse, but once you have, it is an easy task.
If you don’t get ground on pin 3, the ECM is not activating the radiator relay. That can be caused by a faulty engine coolant temperature sensor or a wiring problem between the ECM and pin 3. If you do find ground on pin 3, jumper across pins 1 & 2 in the socket. If the radiator fan runs, then the radiator fan relay is bad. Replace it.
If you see battery voltage, that confirms the engine control relay is providing power to the control coil side of the relays. With the key in RUN position, turn the AC ON. Then check for ground on pin 1 in the condenser fan relay socket. If you detect good ground, the ECM is operating properly
If you’ve confirmed the fusible links are good proceed by placing the relays back in their sockets, run the engine at idle and wait for the radiator fan to activate while watching the temperature gauge. If the gauge rises into the danger zone but the radiator fan doesn’t activate, remove the radiator fan relay and check for ground on pin 3.
How to disconnect electrical connections to a radiator fan?
Lift the clip before pulling the male and female plug housings apart, if your plug is so equipped. Use the blade of a slotted screwdriver to lift the clip if you are unable to pull it up with a finger. The plug carries all electrical connections to the fan. Once it is unplugged, the fan power is disconnected. Jonra Springs began writing in 1989.
