Wired Backwards (Reverse Polarity)? Troubleshooter

Swapped the wires? Disconnect first, then check the damage.

Disconnect power straight away. Work through one question at a time. You can go back or start over whenever you like.

Safety: this troubleshooter is general information for low-voltage DC learning circuits. 240V AC mains can kill: in Australia, work on mains wiring must be done by a licensed electrician. Disconnect power before you touch wiring.

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