With just the key on, the alternator does nothing. With the engine running, a belt drives a pulley on the alternator. Giving the simplest explanation, that pulley is connected to a rod which turns magnets inside a field of copper wiring. That produces electricity. That electricity is alternating current. So it then goes through a diode which converts it to direct current. Then it goes through the voltage regulator, which ensures that your car's battery doesn't get cooked from overcharging. The alternator keeps the battery charged, and that supplies electrical power to vehicle systems.
No
No a diode will not work when the ignition key is off.
Bring lock cylinder and key to locksmith for re-keying
dealer it,s a coded key works with a transponder in system
if the battery is dead, there will be no ignition lights etc when u turn the key your headlights would be very dim if on at all. the alternator only works when engine is running, so if alternator is dead it will not charge the battery most auto stores will check both battery and alternator for free if you remove from car and take them to the store
Not from the factory , just the one key works for the door and ignition
Key or ignition tumbler is worn. If you cannot remove the key, then you will have to remove the tumbler assembly and replace it. If you can get the key out, then try a key that is not used very often. If it works, have a duplicate made of that key and destroy the other key with the problems.
Then it is a defective ignition switch.
If I understand correctly you lost the key and the ignition still works. If this is true go to a dealer they should have a replacement key to buy.
The alternator light goes out on starting the engine when both the ignition source, and alternator are producing positive voltage. When the ignition switch is turned off, the engine, and of course, alternator are still turning momentarily. The alternator is then still producing positive voltage, while the 'off' ignition switch has assumed a negative state, creating a closed + - circuit, allowing the lamp to light. This is a very normal state, and has occurred for many decades, even back to the days of cars running generators, prior to the alternator. Absolutely nothing to fear.
Try it in the ignition and see if it works. I sold my 1993, but I am pretty sure it cannot.
Nope. Ignition well not work. The key you need is just a simple looking round key. In other words a 1995 Town Car has two keys one for the ignition, and door locks. And the second key is for the glove box and trunk.