Driver side headlight keeps going out?

[FordSwampFox]

Hello friends.

I've been having an issue where my driver side headlight keeps turning off, like it's burned out. I recently installed Vland LED headlights and thought it might have something to do with it, but looking at the halogen bulb it looks good to me.

Today I noticed it will be working when I turn the truck on, but after 10 or 15 minutes it turns off. DRL, blinker, and high beam all work, but the low beam just turns off.

Any insight is appreciated.

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[Muscleford]

Likely bad bulb. Had a house led bulb do the same thing.

 

[AUXITO]

It is possible that the vehicle computer system (CAN-BUS) is interfering with the LED bulb.
Cause: The CAN-BUS system in some vehicles may mistakenly recognize the LED bulb as faulty (due to the low power consumption of the LED) and turn off the power. I suggest you can check the owner's manual.


The solution is that you can ask the manufacturer from whom you purchased this product to send you a decoder.

 

[airline tech]

I am confused - LED Headlamps with Halo Bulbs?

 

[Muscleford]

Cause: The CAN-BUS system in some vehicles may mistakenly recognize the LED bulb as faulty (due to the low power consumption of the LED) and turn off the power.

Why would the CAN-BUS system turn off only one bulb??

 

[FordSwampFox]

Likely bad bulb. Had a house led bulb do the same thing.

They're 3 LED for the lowbeam and same 3 LED for high. It turns off all 3, but when I first turn truck on all 3 are working. And after they shut off all 3 work for highbeam.

 

[FordSwampFox]

I am confused - LED Headlamps with Halo Bulbs?

I mean the halogen bulb for the stock headlight. New headlight is LED.

 

[Dereku]

Can you show us what you installed? Maybe a link to the product. Could help with your issues.

If not a faulty led housing, I would suspect a wiring issue. Might need a resistor if there is not one integrated into the housing, or a bad ground. Aftermarket plugs can at times have issues holding the pins in place. I would check there as well.

 

[airline tech]

Why would the CAN-BUS system turn off only one bulb??

It's the FET Protection - Circuit Monitor, all exterior lights have its own - FET Circuit, It's not on the CAN bus though - Its monitoring the Power Feed.
So, there is possibly an issue where the Left Low Beam - Circuit is picking up a short / power issue and it is shutting down the power supply to the light.

Being After Market this can tie in - Forscan Changes as the BCM is still looking at that Headlight as a (Halo) assembly and the DRL circuit which would be tied into the (Halo-Low Beams)
That DRL - circuit feeding is cross feeding power on a LED Headlight that needs moved off of the Headlight circuit.
I suspect that this is the issue, the problem arrises due to how the (Aftermarket) lights wire it up for a tapped source - vs keeping it factory.
The reason - they cannot promote a assembly for sell-and then state must use Forscan for them to operate properly- so they bypass the BCM factory wiring and then for some that By-Pass creates issues with how the BCM reacts, it does not like what it sees and you have lighting problems because as far as the BCM knows, It sees power issues as if the Halo's were installed.

 

[FordSwampFox]

Can you show us what you installed? Maybe a link to the product. Could help with your issues.

If not a faulty led housing, I would suspect a wiring issue. Might need a resistor if there is not one integrated into the housing, or a bad ground. Aftermarket plugs can at times have issues holding the pins in place. I would check there as well.

Sure. These guys: https://www.vlandus.com/collections...s-for-ford-ranger-2019-north-american-version

 

[FordSwampFox]

It's the FET Protection - Circuit Monitor, all exterior lights have its own - FET Circuit, It's not on the CAN bus though - Its monitoring the Power Feed.
So, there is possibly an issue where the Left Low Beam - Circuit is picking up a short / power issue and it is shutting down the power supply to the light.

Being After Market this can tie in - Forscan Changes as the BCM is still looking at that Headlight as a (Halo) assembly and the DRL circuit which would be tied into the (Halo-Low Beams)
That DRL - circuit feeding is cross feeding power on a LED Headlight that needs moved off of the Headlight circuit.
I suspect that this is the issue, the problem arrises due to how the (Aftermarket) lights wire it up for a tapped source - vs keeping it factory.
The reason - they cannot promote a assembly for sell-and then state must use Forscan for them to operate properly- so they bypass the BCM factory wiring and then for some that By-Pass creates issues with how the BCM reacts, it does not like what it sees and you have lighting problems because as far as the BCM knows, It sees power issues as if the Halo's were installed.

So sounds like i need forscan? (Which seems to be the answer to every question with this truck)

 

[cfhgarza]

Check your stored fault codes. When I messed up my forscan settings I was getting a short to ground fault and it was shutting down the headlights. Seems like the BCM doesn't like new headlight wiring

 

[Dereku]

Did you message or call the people that made those lights? Maybe one is faulty. Or they might have a simple fox for you.

 

[FordSwampFox]

Did you message or call the people that made those lights? Maybe one is faulty. Or they might have a simple fox for you.

Messaged earlier today but not heard back yet.

 

[Big Blue]

They're 3 LED for the lowbeam and same 3 LED for high. It turns off all 3, but when I first turn truck on all 3 are working. And after they shut off all 3 work for highbeam.

This is what is so confusing and makes it seem like something internal in the headlight assembly. Why does it shut down in low beam and still work in high beam

The way Bi-LED Projectors work is they have one LED that is used anytime the headlights are on and have a shutter assembly that drops down into the beam to create the cutoff line for low beam.

The headlights the OP has have three of these assembles in each light. All I can think of is a thermal break in the traces on the control board in the light that when the the shutters are activated it turns off the LEDs. Then after the lights have been off for a while the break closes and the lights work again and they work again until the heat up again. Has to be on the main control board as all three of the Bi-LED unit in the light are affected together.

Hopefully the vendor will get you a new assembly to replace the one not working correctly. I know having to change it out is a PITA. If it was a FORScan setting issue I think it would affect both lights the same.

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