A/C blower motor only works at higher speeds ?

Good morning,

Do you have a voltmeter or test light to do some checks for the blower motor system?

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

https://www.2carpros.com/articles/replace-heater-core

I attached a wire diagram and need to see if the correct voltages are present for proper operation.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Roy