I have a 93 Geo Tracker and it quit. charged...

...the battery, No fire, changed fuses. What could it be? We just put in a new motor and were trying to start the car. While turning it over it quit. There is no power at all. No lights not even when a charged battery is put in. (cables are good and terminals are clean and tight. I have tried to jump it even. I figure the reason it would not start is the timing needs set. What would keep it from having power besides the battery? Thank-you

try to change the voltage regulator!

If you dont have lights with a fully charged battery or when attempting to jump it is definately in the wiring. When you changed the motor did you make sure you reattached all the grounds to the block? Also you said it quit while turning over so it sounds to me the load shoted something out. Go over all wires again.