My 1989 ecoline 150 starter fires when u connect the batteryreplaced starter solinoid and ignition switch and keyswitch still starts no key and will still run after van starts

Most all vehicles have main power cable to starter solenoid which is mounted on the starter where the power cable to the switch connects OR there is a separate heavy gauge red wire connected to the positive post of the battery that leads to the ignition switch. Also check your ground cable by connecting battery jumper cable to negative post on battery and other end to metal frame of van.

Is your battery/connections any good?

Check starter solinoid

Hello, I would test the Ignition switch. There are contact points inside the switch and actually both the Run and Start positions on the switch put power to the coil.

If you disconnect the power wire at the coil (ignition post) you can test the wire from the Keyswitch.
Then unplug the Tickler wire on the starter Relay and the starter will not turn while you test the Keyswitch.

Hook up a testlight or voltmeter, get in the cab and turn the Keyswitch to Run and I'd bet the ignition wire is dead. If there is steady power at the ignition wire, either your coil or Module is bad.

When you turn the Key to Start, it should have power at the Ignition wire and I also bet it is dead until you get that bounce of power when you release the Key.

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.

check the wiring to the starter sounds like your starting wiring is not making good contact if not test with a test light and check the fuse hope this helps

could be starter relay or fuse. keyswitch might be at fault .

have to chance the electrical part of the keyswitch.

test starter solinoid wire from harness, with a helper put test light on wire get friend to turn key to start, light should light up, wires at the bottom of engine may (look) fine

The problem is either the starter solinoid (located on fender near battery) or you are not getting power to the "s" terminal on the starter solinoid from the ignition switch. If you follow the positive battery cable from the battery you'll follow it to the solinoid. Remove the small wire from the terminal marked "s" on the solinoid and using a screwdriver jump from "s" terminal (not the wire) to where positive battery cable connects to solinoid. (with battery connected). If starter doesn't do anything the solinoid is bad. If starter cranks then you are not getting voltage from ignition switch through "s" terminal wire.