2000 toyota Celica cranks up without the key in ignition. When we put key in ignition it fully starts.When we take key out.It still have that cranking sound. We have to unplug the battery wire to stop

Your starter relay or solenoid has failed. Replace it and make sure it's shimmed. in properly.

Is it the box that says starter relay when u open it. It's right under neath the fuse box. How do we know which one to replace?

Any mechanic can check the relay to make sure its working properly with a multimeter or most car parts places can check it for free Any electrician can also check if the problem is before or after the relay with a simp!e voltage tester light. If this is all fine then the problem is with the starter or starter solenoid attached to it.

Thank YOU. I'll have someone do that for us..need a car for work by Monday..

We can't find the starter relay or solenoid. Don't know where it's located

The starter solenoid is physically attached to the starter, as a complete subassembly. Follow the two thick wires from the red (positive) battery terminal wire. One will go to the fuse panel, while the other thick wire will go down to a long round tube connected to the motor, usually close to where the motor and transmission meet. Checkout http://www.google.ca/imgres? imgurl=http://i.ytimg.com/vi/QAnx8yL5vOo/hqdefault.jpg&imgrefurl=htt p://www.youtube.com/watch? v%3DQAnx8yL5vOo&h=360&w=480&tbnid=Kx1ITemHkLUbYM:&zoom=1 &docid=knD0V_n3jIQSVM&ei=3MP8VNeUFI3ugwSAuoGoAQ&tbm=isch& client=tablet-android-asus-rev&ved=0CB8QMygCMAI and then http://www.google.ca/imgres? imgurl=http://i.ytimg.com/vi/JyYtSRe3xkc/hqdefault.jpg&imgrefurl=http: //www.youtube.com/watch? v%3DJyYtSRe3xkc&h=360&w=480&tbnid=WsBYaKa5bU3IXM:&zoom=1& docid=o1jBQn26- Xzn3M&ei=3MP8VNeUFI3ugwSAuoGoAQ&tbm=isch&client=tablet- android-asus-rev&ved=0CCAQMygDMAM. Always disconnect the positive battery wire before working on the starter.