Dead battery or corroded battery connections.
1998 Ford Ranger will have power when I turn the key, sometime no power, why? Then I can wait and some power comes back, changes back and forth. Defective Ignition Switch
Does it turn over? Does it turn over?
I have a 1997 grand am and i have power to the starter but when i turn the key over it wont in gauge the starter. all fuses are good. You may have a defective ignition switch.
Starter solenoid
On most autos when you turn the ignition off you also turn the power to the power outlets off. Turn the key back on and restart the player.
mercedes benz 1997 c280 my key won't turn at all. I've tried moving steering wheel and shifter. still won't turn. battery HAS POWER
If its right after you turn off the key it might be a power antenna motor.
check emc fuse and the fuse next to it
On stereos there are two power connections. One that supplies power from the battery and one that supplies it from the ACC position on the key. To not have this happen you can remove the power cable from the acc position and put it on the same connection as the battery power, still going through the fuses. Now when ever you turn on the stereo with the key off the stereo will stay on. One note of warning tho. I have had to jump several cars with dead batteries from this type of setup. So if you walk away from the car remember to turn it off. Another solution is to put a switch in the dash that can be used to turn on power for those times you want it. Just hook the switch up in parallel with the acc power input so when no key is in the acc power will get power from the battery. Then turn it off when you are done. It wont hurt anything if you leave it on and then turn the key on. But if its off and the key is off you also wont run down the battery.
bruh
A person will have no power to the ignition when the key is turned over when the battery is dead or the ignition switch is defective. Each component must be tested to rule them out as a problem.
The starter relay, solenoid or starter itself most likely is bad. If you hear clicking from the starter when you turn the key, then the starter is most likely the cause.