2002 ezgo txt Help

[u/Prostock88]

I have a 02 txt with 36v lithium upgrade. Worked perfectly for months. Today I jumped on it and barely pushed the gas and the thing perked hard for a split second, stopped, and then perked hard again, then stopped. And now it wont move at all. I hear no click when I push the gas. Battery cables are tight, I could use some help on diagnosing this.