Car won't crank or start

do you have a completed circuit???? battery/ cables/grounds?????

Yea errthing new n connected like its spose 2b I was Jst driving it parked n saw my mom tryed 2 start it and it won't even crank

There is a real good chance you need a new starter..

Nope starter is good I think I need a crankshaft senser Cuz now it started up after I let it sit overnight

There is a computer or module under the dash on the left hand side with your key on test it and see if it gets hot if it's hot then that's probably the reason why you're not getting fire to the starter relay or it won't turn on the fuel pump etc

Friend of mine's has a 05 Mercury Marquis change the starter new battery new cables car still won't turn over or say anything I can get up under the car and hit the starter with a screwdriver it will turn over but will not crank with the key on I felt the box or computer under the left side and it was very very hot and I think that's where the problem is with a lot of Ford products I've also have to change this same thing in a F-150 pickup

1989 mercury grand marquis engine does not crank. No battery power to ignition switch (yellow wire harness).