Strange problem

[nelmo]

Not quite sure what happened - came to start my car and it started as normal but there was a high-pitched whining noise, almost like gas escaping. In a panic, I turned off the ignition. The engine stopped but my starter motor was on, trying to start the engine (ignition off!!) - I turned the ignition back on and the engine started and the whine was gone.

With hindsight, I think the whining was the starter motor not having disengaged and being spun by the engine?

Now, I'll come clean here - I have just done a bit of re-wiring (which is why this question is in 'electrics') but it was just to add a distribution box behind the dash for everything that needs a switched ignition. Attached is the new wiring setup - anyone see anything in that that might explain what happened?

Note I do have a switch in the starter motor circuit as a simple immobiliser but I haven't changed that.

 

aux panel wiring.pdf

[theduck]

Sounds like your ignition barrel/starter button stuck on, either that or a short that caused it to stay on

[fry61]

Possible mechanical fault in the starter solenoid, crap ( technical term ) is preventing the return spring from doing its job.

Edited April 18, 2019 by fry61
spelling!!

[dandan62]

Had exactly the same issue last weekend. It was the ignition barrel. Cleaned contacts. Wd40 into the keyway and it hasn't happened again