BMS & Buck Converter Wiring w/ switch, indicator, & usb charger

[austtam]

I took apart an old shark pack battery to transfer to a smaller container to fit my bike frame. I made the mistake of making a piss poor attempt at labeling the cables before I snipped them and now I have no Idea how to wire things back together. I've attached a diagram of the current state of my mess. I can't figure out how the two "SW" wires fit into the mix. Wondering if anyone knows how to put humpty dumpty back together again. Thanks in advance.

 

[amberwolf]

Most likely the SW wires are a SWitch, to enable the BMS output. If it has no voltage on the main battery +/- output without them connected, then measure the voltage on each of those wires relative to the cell-battery negative, or the charge-port battery negative. If it is something like 5v on one, and something like 0v on the other, it is pretty likely that's what it is.

If all the different wires are colored (like in your diagram) and if you still have the old case, you can look at the wires in the case and match them to the wires on your BMS.

 

[austtam]

Most likely the SW wires are a SWitch, to enable the BMS output. If it has no voltage on the main battery +/- output without them connected, then measure the voltage on each of those wires relative to the cell-battery negative, or the charge-port battery negative. If it is something like 5v on one, and something like 0v on the other, it is pretty likely that's what it is.

If all the different wires are colored (like in your diagram) and if you still have the old case, you can look at the wires in the case and match them to the wires on your BMS.

Thanks, I ended up figuring it out. The SW wires do indeed hook up to the power switch C and N01. The red and black wires on the power switch go to the stepdown converter for button illumination, which also powers the usb charger. I didn't need the usb charger, illumination or illumination on the power switch so I eliminated the stepdown converter altogether.