starter engages when key turned off

[mrt54]

Hi everyone, I have searched and not been able to find a thread, and have never heard of this problem before.
Sometimes when turning the engine off the starter engages, I can take the key out and it keeps turning over, turn the key on and the engine starts up, sometimes have to turn the key on and off multiple times to get it to shut down properly.
Sounds like the starter disengages when the engine is running, but re engages when the key is turned off.
No lights or faults appear on the dash and all fuses seem to be in order, anyone got any ideas?
Thanks.

[Rob_Wood]

Sounds like a fault in the actual key switch. Under warranty? Take it back. Out of warranty? Take it to an auto electrician.

[mrt54]

Solved,faulty starter solenoid. Dealership wanted two weeks to make a diagnostic booking so they could discount any aftermarket dual battery problems, saying the only time they had seen the problem like that was when a prado had rain water run down uhf antenna wire into a juntion and caused self cranking of the starter at random times.
I got auto lecky to have a look, he simply isolated the starter wire, connected it again while the car was started, then disconnected it and the starter kept running.
After market starter purchased and fitted for $400 next day, warranty claim would have taken 2-3 weeks so was cancelled.