Last night the headlights did not turn off. They are usually set on auto and turn off an their own. However, now they do not even turn off when I turn the headlight switch to off. Of course, this drains my battery. Any ideas?
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The same thing happened to me. I found the solution quite by accident. Apparently I must have reached over the steering wheel for some reason. On the top of the steering column is the switch for the flashers. I can't remember if there is another switch in that area or it was the flasher switch itself, but I must have turned it on by accident and it was keeping my headlights & taillights on. Hopr this helps
It is possible that both went out at the same time but it is more likely an issue with your running light settings or control or the Switch to turn your lights on. You will want to get a Haynes repair manual on your vehicle to get complete troubleshooting and repair steps or have this checked by a mechanic.
Find the wiring connector on the back of the headlight (under the hood.) Unplug the connector and remove the lock ring around it (turn it like a jar lid a fraction of a turn.) Wiggle the bulb out - it is held in with a rubber ring. Secure the new one in place in the same position - it won't go in the wrong way. Reinstall the lock ring and wire connector.
lift the hood. the light are down behind the light assembly. simply turn large black ring and it will come out. be carefull not to touch the glass on the new one. oil from your skin will cause it to prematurely fail.
How have you determined that the alternator (generator) is working fine?
Whilst the engine is running you need to see if there is at least 12 volts (usually 13.5V) across the battery using a voltmeter or similar tool. Also, whilst the engine is running, what happens when you turn the headlights on? (Does the car stall or try to stall?) This would affect night driving using headlights.
Most importantly, you run the risk of damaging the diodes on the alternator whilst running the
engine with a flat or undercharged battery.
There is also a regulator that controls the voltage from the alternator.
have you checked all fuses, including engine fuses located under the bonnet?