STEP ONE IN TROUBLESHOOTING A SUSPECTED CHARGING PROBLEM.

I've been asked this question many times, so I thought I'd make a quick video demonstration showing you how to do this simple troubleshooting step. This troubleshooting will work with belt drive and gear drive alternators.

With the engine off, turn on the master switch and alternator switch. Battery voltage/DC current travels to the field terminal on the alternator, supplying power to the rotor windings. This current creates a strong magnetic field, turning the center shaft of the alternator into a powerful magnet.

If the alternator becomes a magnet, then the alternator is capable of working with the engine running.

If the alternator does not become a magnet, then there is a problem with the charging system and further troubleshooting is required.

This troubleshooting step, on the ground with the engine off, only works if the battery is fully charged. If you lost your charging system and it drained the battery, this won't work with a dead battery. Let us know if you need any help troubleshooting your charging system.

DISCLAIMER: If your alternator becomes magnetized, that does not mean your charging system is 100% safe for flight. If you are experiencing charging system problems, have it looked at by a Certified Technician and do not takeoff with known charging system problems.