Bronco II with 4.0 from exploder. Starter keeps running after engine starts. Has new starter, 4.0 style with external solenoid, starter relay, batt cables and new battery. Right now the hookup is batt cable & fuse panel cable to right side of relay, starter main and solenoid wire on the left side. I pulled the solenoid wire from the left stud and, with the ign switch to "run", touched the batt cable side of the relay and the truck started like it's spozed to. I've never seen this before. Ideas??