Ignition switch question

[Yooper truck]

I have recently been having some problems with starting my truck. It is dead as in no clicking or other sound when I turn the key. I have cleaned the terminals on the battery and the battery is charged. I believe I have tracked it down to the ignition switch as I reached under and wiggled the wires on the back of the switch and it then started right up.

I was able to get the ignition out of the bezel (thank you for previous posts), but I cannot detatch the plastic connector from the switch. It looks as it if it should slide apart when pressing in the two tabs, but it is still tight. I don't want to break anything pulling it apart as I can look at how it should go back together when reassembling.


So I have a few questions.

1) How do I pull those two parts apart?
2) Is this a common problem with ignition switches?
3) Should I replace the ignition switch and the plastic connector where the wires plug in?

Thanks for any advice.