starter motor running in run position

[erasedhammer]

I was going down the road heading home and accidentally hit the curb, felt hard, pulled over checked everything I can possibly think to check and nothing was wrong mechanically.

Get back in to get off the road and turn the key to run and immediately the engine starts and the starter motor stays on.
I immediately turn the truck off and look at the ignition wiring. Everything is hooked up correctly. I unplug the crank wire and turn the key to run and the glow plugs warm and everything is fine. It's only when the crank wire is connected that the starter motor runs in the run position.

This happened over a 1 minute period and nothing changes he's except that the truck got a decent jolt to it.

Could it have knocked some wire loose in the starting system or something? I'm waiting for AAA but i rather not have a dead Humvee sitting haphazardly in my driveway dead.

Update:
Got the truck home, it's just chilling in my driveway. Noticed another small problem. The fuel filter is leaking a small amount of diesel from the bottom tube. That tube appears to just run up to the wheel well and just terminate? I'll be tightening the connector on that tomorrow and replacing the hose clamp to see if that fixes it...
I apparently hit that curb harder than I thought ...

 

[NDT]

Where did you disconnect the crank wire? At the starter or at the ignition switch?

 

[erasedhammer]

Where did you disconnect the crank wire? At the starter or at the ignition switch?

It's disconnected at the switch

 

[NDT]

Unusual, but it must be the switch.

 

[erasedhammer]

Unusual, but it must be the switch.

I do have the keyed ignition switch, could the internals have gone bad and is giving 24v to both run and crank?

Could the starter solenoid be bad? Or is it more likely the switch?

 

[NDT]

If it cranks with the switch connected and does not with it disconnected, the switch is defective. Now I see your switch is aftermarket, failure of that is not unusual.

 

[erasedhammer]

If it cranks with the switch connected and does not with it disconnected, the switch is defective. Now I see your switch is aftermarket, failure of that is not unusual.

Thanks, I'll swap it out and see if that works

 

[TOBASH]

Be careful and do not strip your flywheel.

Disconnect the batteries and wait 10 minutes prior to replacing the switch!!!!!!!!

Best,

T

 

[ZZZZZZCOBRA1]

I have the same issue did replacing the ignition switch solve your problem?

 

[erasedhammer]

I have the same issue did replacing the ignition switch solve your problem?

Yes, immediately.

 

[ikoinu]

Had an aftermarket keyed one go bad on me too.
You know because when you turn it to on it will bump the starter. Give it a week more and when you do the same it immediately starts cranking in the run position.

Don't make them like they used to

 

[ZZZZZZCOBRA1]

Replaced ignition and it solved the problem thanks!