Added? So where is it connected to the pack negative? Still don’t see a connection other than sense - on 1st pin of the bms harness.
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I don’t see anything other than the small wire in the harness. The main pack negative that will carry all of the current needs to connect to that buss bar so that the bms can function properly. The reason that connection has the big copper bar is to carry the total current of the load...
Right hand side. Needs a cable from battery negative to there. Another cable. Not either of the others already connected.
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Sorry docw009 I misread his first post. The main battery - has to connect to the B- on the bms for it to work. It appears that has not been done.
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The + side only connects to the load and the charger and the power in for the bms. Then the sense wires are connected to each cell +. If the load and charge + are the only connected to the b- and c- it will not work.
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The problem I see is you have your + connected to the c- and p- . Bat- to bms B-, charger - to bms c- and load- to p- . Battery+ is only connected to the bms to provide power. Individual cell + to each sense wire. Like this...