Driver side headlight stays on with car off.

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cobra93

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I have a 2017 Taurus sho that has had minimal problems the past 2 years.I took the car to have tires put on yesterday, (Saturday) it was fine all day.
This afternoon (Sunday) I tried to remote start the car before I ran to the store. It didn't start, the car is dead. The keypad barely lit up.
I got it jumped and went to the auto parts store I got the battery from just over a year ago, it checked out good.
When I pulled into the auto part store parking lot I noticed the drivers side headlight was on and nothing I tried would make it turn off. I went back in to purchase a battery charger, just in case. When I went back out to the car (I left it running) the light was off. I got home put in on a 2 amp charge. After 2 or so hours I went out to check it and the drivers side headlight is back on again and I can't turn it off.
I did a search for which fuse is on that circuit, pulled the fuse and the light is off.
I thought this might have been something glitched from the dead battery, but I assume the light came on last night Saturday) and drained the battery down to 6.5 volts.
It's only the driver side headlight. I replaced both bulbs this past summer with the stock osram bulbs and they have been okay since.
Does anyone have any ideas, a search didn't bring up anything and I hate to try to get into the dealer especially this time of year.
Thanks for your time, Joe
 

Rtlspud2

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What did you do to fix the headlight? I have the same problem.
Don’t see any answers here.
 

Jake0811

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I'm having a similar issue with mine. Driver side headlight will stay on when the car is in remote start mode. Or when I open the door the amber "parking" lights should only be lit up not the headlight. Replaced the Osram bulb for that side. I'm thinking it's something with the wiring or a relay. My 2015 was involved in a minor fender bender on the driver's side so I'm thinking something got messed up. It's frustrating.
 

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kryptto

The Best Thing About Cars... ones in my mirror.
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I thought this might have been something glitched from the dead battery, but I assume the light came on last night Saturday) and drained the battery down to 6.5 volts.
These cars need strong batteries. There is a couple of methods to clear the/KAM. Keep alive memory. Pull the battery cables let sit for 40 mins. Or with the take the neg cable off, cover neg terminal, use a alligator clip jumper wire, connect pos to neg cable for a min or two.

Also Forscan and a windows laptop can help you with the state of charge of the battery. There are $15 battery meters to help see the health of the battery or SOC.

This also goes with properly charging your battery with a trickle or other charger. We have a battery manager system, if you charge the car put the neg charger cable to a strut stud, and connect positive changer to positive battery.


This same guy also covers how the BMS works.

 
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