94 300zx won't start doesnt crank or turn over

[Jioz32]

Hello I have a 1994 NA 300zx, I am struggling because the car won't start, turn over, crank , the dash lights don't even turn on at all. I've check the. Battery (charged). Has a new alternator, cleaned corrosion , and replaced starter relay. The only way it'll turn on is through a jump. But even thin it'll run fine for a couple days then happen again. No security light comes on & again no dash lights or nothing comes on it's just plain dead. At times when it does turn on my abs light will come on & my rpms & speedometer will jump. I'm new to the z32 community and plain lost so anything helps.

[rgregoryb]

Check all your grounds.

[sns00]

Did you figure it out?