Why my 1995 park ave door locks stopped working?

hello, did anything eise stop working like dome lights,pass,side pwr seat or prw antenna ? if so check ground(black) wires.i found a coroded splice connector on rt.side kick panel area under carpet. as soon as i touch connector it started working. i cut all black wires , stripped ,sodiered and taped up. also clean up and eye termnal and bolt .