Ok like they said you need to give us info on what EXACTLY it does when you put the key in and turn it BUT the main thing people forget to connect is the ground that is close to the thermostat housing. It should have a wire ground that is on a 10mm bolt and that is for the ecu so you must have it grounded. If not try the tranny ground like previously stated but that shouldn't be your problem. If it isn't that then try ^^ aboves statement with tapping the starter maybe that is locked up.


If that doesn't fix it answer these questions.

Do the dash lights come on?
Do you hear the chime when you turn the key like normal?
Do you hear the starter try to engage but not crank over?
Does it try to start at all? (I think you already answered but specify)
If the dash lights do come on are they dim?
does the radio and all exterior lights work?

Anything and everything you can think of let us know so we can try to help out better.