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1999 base 5 speed manual "Theft" key issue

1.4K views 2 replies 3 participants last post by  Bookieman420  
#1 ·
I recently had to put a new computer in my mustang. Also replaced CAT and both exhaust manifolds. Was running fine, then all of a sudden it wont even crank and the only light indicated is the "theft" light. Any input on how i can get started or reset. Much thanks!
 
#2 ·
You're passive anti theft system- PATS- would let it turn over but not start. At least this is the case for my 03 gt. Have you pulled the codes?