What another reason for my car not startin might be?

What is your question?

i have a 1996 lincoln town car eecutive.. replaced the starter last week and put everything back together correctly. battery is like new and again, connected correctly. i tuen the key to the on position and everything works, i turn the key forward to start the car and dash goes black n everything shuts off but comes back on when i go back to the on position. i believe i have a dead short. i couldnt find anything that was grounding out.. im lost. fuses are all fine as well.