How to change a toyota matrix battery - 2006 Toyota Matrix

if you have these then the starter has an open in it and is bad.

If your vehicle was running while you
changed a fuse, you may have fried the computer.
Try disconnecting the positive(red side) cable on your
battery. Desconnect it for about 5 or 10 seconds
then reconnect it. This will reset everything.
That is, if you didn't fry the system. You might
want to check that fuse you replaced. For future
reference, only change fuses with vehicle off.

How to change a break light on 2012 Toyota Matrix

Did you change the terminals? They might be badly corroded or dirty which is causing it not to start the car. Buy some new ones if you haven't already.

check main battery fuse

remove starter and manually start it using your battery leads with wire if it work then your starter and battery is ok / if not then your engine must have been stuck-up consult a mechanic for full diagnosis..

http://us.toyotaownersclub.com//index.php?s=bb18602e7ff4236dab25828b356169e0&showtopic=141&pid=7424&st=0&#entry7424

here you can find detail instructions and pictures. Have Fun!!

may have shorted out ECU ?

Get out the manual, and check the fuses. Sounds like one blew during the battery change.

Hi there,
Try adding a little WD40 to the lock itself. Use your hands to lock and unlock it to get the oil to spread. Put a little oil on the key, then put it into the lock. Use your hand and key to move it through the lock and unlock stages. I hope that this is some help to you. Good luck and let me know. Have a great night.~MWD