have 2002 focus se with bad sohc engine. change engine from ztec 2000 focus. both have auto tranny. what I did was take engine and tranny out of 2000 with 103,000 mile on it. also took wire harness, computer, ac line,exhaust from doner car to put in the 2002 se. got everything together went to start engine, won't turn over. red light above four way switch flashs fast. radio go out when you try to start engine. need some help.