I have a 1990 ford bronco. ive replaced the battery, starter, and solenoid, but all my truck does when you turn the key is crank but it never starts just cranks over and over. i dont really hear the fuel pump turn on but im not sure if its the pump or a relay or what.

Yeah, that's consistent with fuel pump fail or bad relay or fuse.

If a manual transmission you can try push starting it . Take the belts off and see if it cranks then . Pull out all spark plugs and attempt to crank it over .

It definetly sounds like starter motor issue....there are 2 circuits within the starter motor, one is the pullin winding, that brings the gear close to the flywheel, and the motor windings that "cranks" the motor. It sounds like the pull in windings are working but the cranking circuit has failed.

This requires a starter motor replacement.......what you can do is "lightly" tap the starter motor with a blunt object and it might start once or twice, but a replacement is highly suggested.

Just answered identical problem in another make of vehicle. There are 2 possibilities for your problem. A bad Keyswitch and/or a bad Starter Solenoid. I assume your Bronco did not start, which is a good thing. You could have damaged the teeth on the flywheel if the engine started.

You may need to replace the Keyswitch. It is suppose to send a signal to the "tickler" wires on the Solenoid, connecting the Battery to the Starter. Either the Keyswitch shorted and continued to power the Solenoid, or the Solenoid shorted and Welded a connection after the Keyswitch was turned OFF.

Remove the small wires to the Solenoid. If the Solenoid is welded internally, the Battery will spark when you try to connect the Battery cables and the Starter will spin. This would mean the Keyswitch may still be good, do not reattach the small wires yet.

You would need a testlight or Voltmeter to test each small "tickler" wire by attaching the testlight to a Ground and the other end to the tickler wire. When you turn the Key to Start, the light should Glow. It should not Glow all the time.

My advice is to replace both the Keyswitch and the Solenoid because of the wear they encountered with the malfunction. Then when you get the Bronco to start, go to Autozone or Oreillys for a Starter draw test to see if the Starter was damaged by your other problems. Both of those Parts stores test and scan for free.

you have a dead cell in your battery witch will not turn the starter motor try switching the old batt w/ the jump batt and that mite do it ... i would start there b4 i checked any wires..

your starter,solenoid or ignition is no good. but my first choice,i think your solenoid is shorted because when you hook up the battery,it cranks but does not start.that means your ignition switch is still working.

Remove starter wire from solenoid and firmly touch it to the other wire on solenoid. It will spark some, starter should crank if working; providing battery power is good and the battery connections are clean. Check the heavy ground wire from battery to where it's connected to the engine or body are clean. If not, starter is bad.

check ecm

first check all fuses, even the high amp fuses under hood. if you replaced the batt. cable and all that check the wiring in the steering column and the wiring to the fuses under the dash. mice get in there and really make a mess!! it could b the key switch too

i think you might have some wires mixed up!