Anyway to activate x166 dual rear fog lights?
Thread Starter
Junior Member
Joined: Oct 2005
Posts: 52
Likes: 6
Anyway to activate x166 dual rear fog lights?
I am wondering if there is a way to turn on the passenger side rear fog light along with the driver side. I am in the process of converting the rear halogen bulbs to LEDS and would like to put rear led fog bulbs instead of the dim halogen ones. I just swapped out the brake lights with can bus LED bulbs from ebay and they look amazing. Makes the car look like its from this century with a more intense red led hue and instant on/off. I am trying to figure out how to remove the inner tail light housing but it looks like I will need to remove the trunk panel so im going to gather the right bulbs for the reverse/fog before tackling it.
But I am wondering if there is special coding involved to get the other rear fog light to turn on? If its going to be an expensive dealer programming ordeal, I may just figure out how to wire one into the other since LEDS consume significantly less than halogen bulbs. I would imagine if both were can bus, it should be okay? or maybe get non can bus and wire in my own resistor? Not entirely sure, but wondering if anyone here has tackled this and can offer insight before I just go and wing it.
But I am wondering if there is special coding involved to get the other rear fog light to turn on? If its going to be an expensive dealer programming ordeal, I may just figure out how to wire one into the other since LEDS consume significantly less than halogen bulbs. I would imagine if both were can bus, it should be okay? or maybe get non can bus and wire in my own resistor? Not entirely sure, but wondering if anyone here has tackled this and can offer insight before I just go and wing it.
MBWorld Fanatic!
Joined: Nov 2014
Posts: 4,242
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From: Chicago burbs
2015 S550
I am wondering if there is a way to turn on the passenger side rear fog light along with the driver side. I am in the process of converting the rear halogen bulbs to LEDS and would like to put rear led fog bulbs instead of the dim halogen ones. I just swapped out the brake lights with can bus LED bulbs from ebay and they look amazing. Makes the car look like its from this century with a more intense red led hue and instant on/off. I am trying to figure out how to remove the inner tail light housing but it looks like I will need to remove the trunk panel so im going to gather the right bulbs for the reverse/fog before tackling it.
But I am wondering if there is special coding involved to get the other rear fog light to turn on? If its going to be an expensive dealer programming ordeal, I may just figure out how to wire one into the other since LEDS consume significantly less than halogen bulbs. I would imagine if both were can bus, it should be okay? or maybe get non can bus and wire in my own resistor? Not entirely sure, but wondering if anyone here has tackled this and can offer insight before I just go and wing it.
But I am wondering if there is special coding involved to get the other rear fog light to turn on? If its going to be an expensive dealer programming ordeal, I may just figure out how to wire one into the other since LEDS consume significantly less than halogen bulbs. I would imagine if both were can bus, it should be okay? or maybe get non can bus and wire in my own resistor? Not entirely sure, but wondering if anyone here has tackled this and can offer insight before I just go and wing it.
Member
Joined: Sep 2006
Posts: 185
Likes: 28
From: Southwest Florida
2013 GL450
I read somewhere from another forum member that the passenger side is specifically turned off in the US (not sure if it's coding, but sounds like it ... ) ... when I switched mined out for LEDs, couldn't understand why the passenger side would not come on, thought the bulb was perhaps burnt, but switched the working driver side for the passenger side and sure enough both BULBs were working, but only on the driver side ... and yes, you have to remove the tailgate panel to get access to them ....
May I ask which LED break bulbs you got from EBAY? I got mine from Amazon and they're bright as well, but after 10 months, one of them burnt out ... and these are the only ones that did not give me an error code in the dash ... thanks for sharing ...
May I ask which LED break bulbs you got from EBAY? I got mine from Amazon and they're bright as well, but after 10 months, one of them burnt out ... and these are the only ones that did not give me an error code in the dash ... thanks for sharing ...
I am wondering if there is a way to turn on the passenger side rear fog light along with the driver side. I am in the process of converting the rear halogen bulbs to LEDS and would like to put rear led fog bulbs instead of the dim halogen ones. I just swapped out the brake lights with can bus LED bulbs from ebay and they look amazing. Makes the car look like its from this century with a more intense red led hue and instant on/off. I am trying to figure out how to remove the inner tail light housing but it looks like I will need to remove the trunk panel so im going to gather the right bulbs for the reverse/fog before tackling it.
But I am wondering if there is special coding involved to get the other rear fog light to turn on? If its going to be an expensive dealer programming ordeal, I may just figure out how to wire one into the other since LEDS consume significantly less than halogen bulbs. I would imagine if both were can bus, it should be okay? or maybe get non can bus and wire in my own resistor? Not entirely sure, but wondering if anyone here has tackled this and can offer insight before I just go and wing it.
But I am wondering if there is special coding involved to get the other rear fog light to turn on? If its going to be an expensive dealer programming ordeal, I may just figure out how to wire one into the other since LEDS consume significantly less than halogen bulbs. I would imagine if both were can bus, it should be okay? or maybe get non can bus and wire in my own resistor? Not entirely sure, but wondering if anyone here has tackled this and can offer insight before I just go and wing it.
Thread Starter
Junior Member
Joined: Oct 2005
Posts: 52
Likes: 6
I highly doubt that the truck is wired to be able to use fog lights on both left and right. And why would you want to do that anyway? The fog light is essentially your brake light turned on at all times. So if you run it on both sides, it will look like your driving with your left foot resting on the brake pedal with a burned out 3rd brake light.
Thread Starter
Junior Member
Joined: Oct 2005
Posts: 52
Likes: 6
I read somewhere from another forum member that the passenger side is specifically turned off in the US (not sure if it's coding, but sounds like it ... ) ... when I switched mined out for LEDs, couldn't understand why the passenger side would not come on, thought the bulb was perhaps burnt, but switched the working driver side for the passenger side and sure enough both BULBs were working, but only on the driver side ... and yes, you have to remove the tailgate panel to get access to them ....
May I ask which LED break bulbs you got from EBAY? I got mine from Amazon and they're bright as well, but after 10 months, one of them burnt out ... and these are the only ones that did not give me an error code in the dash ... thanks for sharing ...
May I ask which LED break bulbs you got from EBAY? I got mine from Amazon and they're bright as well, but after 10 months, one of them burnt out ... and these are the only ones that did not give me an error code in the dash ... thanks for sharing ...
These are the bulbs I purchased from eBay
https://m.ebay.com/itm/2x-No-Resistor-Required-Red-1156-P21W-7507-LED-Bulbs-For-Tail-Brake-Stop-Lights/232478201419
They look perfect imo. Just the right amount of brightness to blend nicely with the third brake light and you can stare at it without going blind which I can't say for my other cars with oem led brake lights. Also no error messages on the dash.
Last edited by NewCents05; Aug 21, 2018 at 01:24 AM.
