The blower motor stopped working; it has no power?

Also note, I have run power directly from the battery and the blower kicks on. I am thinking it is a bad wire from the panel to the fuse, but I am not confident in that. Maybe the violet/brown wire to the fuse.

Hi,

There is a blower motor relay located in the instrument panel fuse box on the left. Have you checked it? I believe fuse 32 (you mentioned above) will only have power when that relay is complete.

Let me know if you checked the relay. Also, the relay primary side receives power from the body control module when the fan is requested. That is what allows the relay secondary to close and send power to the motor.

If you haven't checked the relay, switch it with a different one in the box having the same part number to see if it works. If there isn't one, here is a link that explains how to test the relay and circuit. I suspect this is where the problem is coming from.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Let me know. Also, take a look at the schematic below and let me know what all you have checked.

Take care.,

Joe

See pic below. Note: I had to cut the schematic in half.

I have looked in the panel and cannot seem to find a relay at all. Could it possibly be built into the BCM? The only thing I have been able to locate is the 3 fuses I mentioned. The 40 amp in the engine compartment and two 10-amp fuses in the dash fuse box. There is not an obvious relay in the compartment, only micro fuses.

Also, would the Violet/Brown wire not be the supply of power to the fuse that is dead? The power should flow from the VIO/BRN wire that supplies the fuse to the Red/BLU wire that supplies the power to the blower itself. I know the VIO/BRN wire comes from the HVAC control panel. Does it route somewhere prior to going to the fuse?

Or better yet. Could it possibly be a relay that is labeled as something else? The only relays I see in the instrument panel fuse box are, RUN, RAP/ACCY, Liftgate Release, and then more JCase fuses.

Hi,

Fuse 7 (blower fuse 40-amp) in the under-hood fuse box is what actually sends power to the relay and then to the motor. That is the power supply for the relay's secondary side. The wire color is red with a yellow tracer.

Power to the primary side, which is what triggers the relay to send power to the blower motor, comes from the body control (BCM).

Also, and most importantly, you nailed it. The blower motor relay is actually referred to as the "Run Relay". See pics below. I found it in a different manual.

Check that and let me know what you find.

Joe

See pics below.

It was the relay! Thank you for your help!

Hi,

Thanks for the update. I'm glad to know you got that taken care of. It's getting cold. LOL

Take care of yourself and feel free to come back anytime in the future.

Joe