Help Please!!!

96-4.0- auto, no start no crank no click, bypassed nss with jumper still nothing, hooked up push button to starter solenoid and starter spins but does not engage and crank engine. Took starter off and had it tested and they said it was good. Why would it spin but not engage with the push button thing? Key was in "on" position.

nevermind, had bypass hooked up wrong

go and clean up all your grounds i had the same problem battery,firewall, computer everything