Archived: the OG noob question thread! 😀

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How to hand-test a BLDC motor [SERIOUS]

Sometimes if you’re buying used, or troubleshooting, and need a quick way to see if anything might be wrong, you can test a BLDC motor with only your hands. It’s not the most accurate test in the world, but catches most problems. [f5c1e17e62e9f244432bf763be93746978c88931%20(copy)] Ensure motor phase wires are not connected to an ESC or anything else. Verify the motor spins without grinding or rubbing. Put a tad of sideways stress on the shaft and push it and pull it (while turning) to veri…

or for the ESC FETs use a multimeter to check

Phase A to Bat +
Phase B to Bat +
Phase C to Bat +
Phase A to Bat -
Phase B to Bat -
Phase C to Bat -

None of those should read under 50 ohms while ESC powered off.