Re: '89 Bronco wont start...
How did you test the starter? 'bench test'? If so, although that my tell you it is engaging and spinning, it isn't under a load, so not really 100 % accurate. Can you turn the motor over by hand? Make sure it isn't siezed or hydro-locked. But first of all, I would make sure all connections, (battery/solenoid/starter) are clean and tight. Check the wires under the insulation to be sure they are not corroded. Also make sure you have good grounds-- body,frame and engine.