it is best to replace the whole starter on a vehicle that is this old because the starter motor and brushes are worn as well. ( you will have to do the same repair twice ) You replace the whole starter motor as a unit with the solenoid. You can get a Chiltons manual at an auto parts store to help you. Be SURE and disconnect both negative ( 1st) and positive battery cables before you do anything and be sure that the starter matches up perfectly. there are a few different starter configurations for your Celica.