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Chase wire down from fan back to engine sensor at the end of it change it then and double check fuzes it will tell you of surge of power but not of a bad sensor
If it's electric fan then the wiring pig tail is bad or the relay is toast had same problem on electric fan and it was just the wiring at conectors was bad try that k
the cooling fan fuse is located in the main fuse panel,location of which should be in your owners manual if you have one if not call the dealer and ask.it could be the cooling fan motor itself not working or the cooling fan relay.to check the cooling fan if you disconnect the plug on the back of the motor and feed direct power and ground to the terminals of the motor.if the fan starts to work then it is okay.to change the cooling fan it is a job for a shop to do as it entails alot parts removal to get to the fan itself
Hi. You may check also the relay switch of the blower. You can test also the fan by using two wires and tap it directly to the battery and see if you are getting the fan worked. is nothing happens then there is a need to replace the fan.
The problem is not with the failed fan from a
broken fuse, rather it is a problem in the electric motor fan because
it is a very common problem with BMW E39, but E46 and E53! Switching the fan is completely controlled by
signals from the motor and the computer is powered pres thick wires and
securing them directly 70A fuse in the engine compartment in electrical box.
If your ac auxilliary fan does not work while the AC is on, yet the ac cools while the car is moving, then you need to replace the ac aux fan resistors. there is a kit available for this problem and is not that expensive. the fans very rarely go bad, just the resistors usually. If your fan is turning, then it is something else. This is a common issue.
Regards,
Paul
Run 12v direct from the battery to the fan bypassing both the fuse and relay to see if the fan itself is good or bad. disconnect the plug from the fan to the rest of the car to isolate just the fan to the battery.
With electric fans it’s almost always the fan motor. To check it run wires from the positive and negative battery posts directly to the fan motor connector. If it doesn’t run the fan motor is defective.
are you saying the fan never comes on or just doesn't come on when you're watching it? most fans come on when the radiator coolant reaches a certain temp, then flips a relay to send power to the fan.
if the car is warmed up and the fan is not coming on (or if the A/C is selected on and fan doesn't come on), i would suspect the relay since you already proved separate power to the fan does make it work.
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