When you say " it won't run" , do you mean , it wont start? wont kick? If it won't kick the trarter you probably have some other electrical problem . Could be immobiliser , just by-pass it and see how you go .
If you don't know how to do it , its not easy, take it to an auto electrician , he should be able to sort it out for you . The s15 200sx has a similar set up , if you have them in your counrty .