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Turn off headlights when ignition off
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Thats cold - marlten
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Woah. This is cool. Probably too "next level" for me, but nice one. Totally got my vote. - offseid
That's pretty much exactly as I would have done it. Light switch will still operate as normal as long as ignition is turned on even if engine isn't running and can be turned off if he's sitting there listening to music or something (my stepdaughter used to do it, she could flatten battery by using car stereo system.) Ultimately though, it would be better to 'train' your son to check light switch, all the 'bells and whistles' on new cars just promote irresponsible behavior as 'car will do it for me' and get treated like a mobil living room - crazypj
This replayreb cat always knows whats up! - justind119
Thanks! Cars are getting more complicated with the computers and electronics for sure. I found this relay that has an adjustable delay that could keep the headlights on for up to three minutes after the ignition is turned off. It fits a standard 12v automobile relay harness so it is plug and play. http://www.qualitymobilevideo.com/bu508td.html
OMG! I watch those guys all the time on Youtube but I swear I have never seen that episode! I'm glad I didn't or else I wouldn't have figured out how to do it with only one relay without cutting any high power wires to the headlights.
I thought about that and I guess I could wire two relays both in parallel for redundancy but there are many relays in a car and any one of them could fail at any time. I agree none are as critical as the one for your headlights so I did tell my son that if his headlights go off while driving he should pull back on the stalk (for flashing your headlights) and hold it until he can pull over safely.
https://www.youtube.com/watch?v=ti70RkSVpO4&ab_channel=MightyCarMods - ericbell
Hopefully the lights don't turn off when he's driving down the road at night causing him to crash the car or a Truck to crash into him, what happens if the relay stops working? - mikiex
Well done. Very handy - Rusty88
Doesn't the buzzer remind him? Just make it louder :)Maybe replace it with a recording "If your battery goes flat, I'm not driving out at 3am to jump start your car, if your battery...." :DIdeally you want to control the lights through some logic. e.g. as followsignition on + light switch on : lights turn off when the ignition is turned off or the light switch is turned off (As you have it)Ignition off + lights on : lights turn off when light switch is off, or ignition turned on and off again. You may also want to include a delay-off timer while at it. If any one of your mods fails you may have quite an issue! The original setup is pretty robust. You must be able to turn the lights on and off as required. If either fail you may have a dangerous condition. Is a flat battery worse than a crash?And, BTW, most modern cars (in Europe at least) use CAN or low current signals into the management unit that then controls systems using logic, so adding a light sensor gives, self dipping, auto switch on, auto switch off, delay off etc. this is fairly simply without complicated cabling and lots of relays.On my own car, my lights will turn off if the ignition is off AND I open the drivers door. If I want my side lights left on while away from the car, I have to turn my lights off, with the ignition off, and turn them on again!My wife's car has a buzzer! :( Never left them on.Nice clear instructable though :) - AlphaOmega1
Alternative: https://www.eeweb.com/blog/extreme_circuits/simple-headlight-reminders - bigredlevy
an alternative: www.eeweb.com/blog/extreme_circuits/simple-headlig... - bigredlevy
This is forbidden in France (and I think elsewhere as well), you always must be able to turn your light on. It is an obvious question of safety. You'd better turn a buzzer on. - rafununu
It would 99 times out of a 100 but just in case he forgot that one time... And I probably did it more for his convenience more than anything else. Turning off your headlights is so 80's :)
Nice. been looking for something like this. tho would have to find a car auto elec to install. thanks for posting - RamblinLane
good job. - 3366carlos
nice 'able, but surely the loud audible buzzer upon opening the drivers door should jog his memory enough for him to turn off the lights? - smaster2
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