If you are using a connector system on your projects, a good thing to always check is to make sure that your connections are correctly polarized. The good news is, if your connections are not correct, it is usually very easy to switch them around and fix them. In this guide, I will be using 20 gauge silicone JST connectors.
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If your connections are crossed, it is usually as easy as pushing in a couple of pins and sliding the wires out and back in to the correct places.
Find and push the pins
Push the tabs down
Pull the wire out of the connector
Make sure pins are reset
Push pins back in
Push the pins back in to the connector in the correct order.