My car was jumped incorrectly. The car seems to operate just fine, but the fan does not blow. When the ac or heat is turned on (to any level), nothing seems to be blowing out of the vents. The fuses were checked visually and several replaced. One of the fusible links was removed and replaced (one of…

In recent decades the blower motor has been controlled by a duty cycled transistor, something like the device in your post. Resistor blocks only provide 4 or 5 speeds, a blower module can provide multiple fan speeds. Chrysler used blower modules before the first Lexus was manufactured. You won’t fin…

No luck when rapping on the blower motor. Would have been nice it if was just the blower motor shorting…

Yes, Nevada_545 that is my understanding as well. My make and model does not have a separate blower motor resistor. Also, to verify the blower fan was not receiving power I unplugged and removed the blower fan from under the dash and stuck the multimeter leads in the terminals while the car was run…

It is best to back prove the connector while it is connected to the blower motor, inserting a probe into the connector can cause damage. Connect the negative meter lead to body ground, test the connector for power with the positive lead. The white wire is battery power, the blue wire is the control…

Thanks for the back probing information, that is much better and easier. (I practiced on the light that sits in the plastic cover protecting the blower motor to make sure I was doing it correctly, and then moved onto the the blower motor.) According to my voltage measurements, the motor is not recei…

There is no relay, the power is direct. AF4 in the diagram in a connector behind the left kick panel. Is there power at the 50 amp fuse?

I can’t thank you enough for your time and help! Sorry I don’t know a lot, but could you help explain how I can test to see if there is power at the fuse? It’s part of this fusible link. I replaced this link a few days ago in hopes of fixing the issue, but no luck! The part was ordered from the lexu…

Check for power at the stud, that is power going into the fuse assembly. To check power out of the fuse you will need to access the bottom of the fuse box, that won’t be easy. It is easier to check for power at connector AF4. Remove the drivers door sill plate, remove the drivers foot well side pan…

2010 Lexus RX 350 — fan won’t blow after jump

Maintenance/Repairs

lilithlex July 8, 2020, 8:43pm 17

Could it be a relay? I am looking at the chilton wiring diagrams to see what is in between the fuses and the motor, but it is pretty hard to dissect.

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2010 Lexus RX 350 — fan won’t blow after jump

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