Greetings I have an unknown with a 9 or 12v DC panasonic fan motor the motor is used in refrigerators with electronic control but I will not give that utility, in the same way what I can learn will serve me in the future, it has 4 red wires, white, yellow and blue, if the corresponding connections are made white to negative, red to positive does nothing, but when joining yellow with red the engine starts, blue seems to be a Hall effect sensor,
What I need to know is if you can connect directly to the corresponding voltage and let it work directly without the electronic card , I searched the Internet I found a video (HOW TO TEST PANASONIC FAN 9.75V) where they show how to connect BUT they say the test It must be done for short periods and do not explain why.
I add reference image
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Thanks in advance for your possible solutions