I have 1990 F150 4.9L 2 wheel drive.
I have replaced the starter and now the starter drive stays engaged even after trying 4 different ones.
So I replaced the Ingnition switch, the cyliniod on the firewall, and new battery teminal connectors. Ithe starter drive still stays engaged.

What could be the problem?
Does anyone have a possible solution for this situation?

TIA

Gregg