86 f150 wont start
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You've got a dirty connection or bad cable somewhere. Beings jumping it off worked, I would guess a dirty connection. If you didn't clean the inside of the cables good where they hook onto the battery posts, when you installed the new battery, it could be there. Follow the cable that hooks onto the negative battery post and clean the connection(s) where it grounds. Also make sure the connection where all the cables hook together on the solenoid with the positive battery cable is clean and tight.