That’s a lot of symptoms! The starter circuit on a 1999 is a bit complicated. The key position three on the ignition switch sends 12 volts to the starter relay, but the ECU closes the relay ground through the 2/76 lock controller as part of the immobilized system. The jumper terminal is upstream of ...

There are two parts of the ignition switch Mechanical part is security bolted to the steering column. You need a Dremel to release the screws to remove replace this. No electrical connections. Rarely goes wrong The back part of the switch is held in by two torx bolts and has all the electrical stuff...

I never found or could see any obvious issue with my electrical portion of the switch when I had problems. One of the issues is you can't easily test it for internal wire failure as you can't see the contact wiring, and then if you look at the copper contact areas you can see wear marks in the coppe...