Could all your symptoms be explained by having a bad ignition switch?
If not, maybe you have a combination of problems, which will cause a lot of confusion. Ideally, you can use proven techniques to rule out
easy things, so you don't end up barking up the wrong tree.
What techniques have you used so far - do I have the list correct?
- Check some of the fuses (not all fuses, not multimeter, visual only)
- Replace battery and confirm replacement battery tests out good
- Disconnect and reconnect battery overnight to allow car computer to reset
- Toggle ignition switch
- Toggle door lock switch
Steps 2 and 3 are great and helpful, but steps 1, 4, and 5 are probably not going to help rule out anything.
There are steps you can consider doing, which rule out problems definitively:
1. Check if the engine is seized by trying to turn it over manually using a wrench
2. Test the starter motor directly by connecting it to 12 V
3. Test all fuses with multimeter
4. Identify specific electrical symptom and then follow the specific test procedure to verify the circuit affected by the symptom
5. Look inside the engine to see if a squirrel chewed up your wiring
It seems like you have a problem with the starter system, and also a problem with electronics generally. I feel like even if you fixed the problem with the no-start, you still have problems with the indicator lights not working properly.
But, if your ignition switch is bad, then that might cause all the symptoms you are having I think? It's hard to tell exactly what problems you have, maybe you can list them out specifically using a numbered list like:
1. no starter operation
2. such and such indicator light fails to illuminate
3. such and such indicator light fails to turn off
A common problem that can cause no crank no start is a simple problem with the brake switch or the little bumper that the brake switch interacts with, either of those can fail and create your symptoms. The car will refuse to crank or start as if you aren't holding down the brake pedal because the brake switch stops working. Is your car behaving like that, as though you are trying to start it without pressing the brake pedal?
If you list each specific symptom out, we might see some pattern and narrow down the possible causes, whether it's the brake switch, the ignition switch, or some combination of problems that cannot be caused by a single point of failure.