Headlights and taillights quit working

[dahur]

My lights haven't worked for a few years, so I thought I'd try and find out why. In tracing out the wiring from the taillights , when I removed the controller cover I found this loose wire. It goes into the cable from the taillights. It's black so I assume it's a ground..? Sorry, I'm not much of an electrical person. It can reach to the negative battery terminal, it's possible I didn't reattach it when I cleaned the cables. But not sure. Can someone tell me where they think this wire should go..?
Thanks.

[Cobra,1]

What year cart,what voltage,12 volt convertor or batteries used to supply 12 volts to lighting circuit?
Guestions that need to be answered to better help trouble shoot problem😊
Having just getting done trouble shooting lighting problems myself, forum will need that info to help.And help they will👍

[kgsc]

If it had factory headlights with no converter it would get 12 volts from the back 2 batteries on the passenger side. Black wire is negative connected to the back passenger battery negative and there should be a green wire attached to the positive on the back center battery.

[dahur]

Originally Posted by kgsc

If it had factory headlights with no converter it would get 12 volts from the back 2 batteries on the passenger side. Black wire is negative connected to the back passenger battery negative and there should be a green wire attached to the positive on the back center battery.

Thanks...
I went ahead and attached the black wire to the negative and now the headlights and taillights work. I thought that's where it went, I just wanted to be sure.

[kgsc]

In the future when you remove wires from a lug put them together with a bread tie or zip tie and you won’t have this problem again.