Go to your local library and look up a copy of a Chiltons or Haynes, or go to a book store and buy one. If you really want a good book on your B2, go to ebay and look for an EVTM, (Electric and Vacuum Troubleshooting Manual), for your year Bronco. It is the single most useful book you can get. They have the firing order information in it. Next time change one wire at a time if you are not sure what you are doing.
Good luck,
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