LED side marker lights check light

I had an 06 VNL and went to replace the rear turn signal with an LED one. Was told that I was have to replace to whole wiring or something…….That i would keep getting error messages on the dash...

 

It is because the lcm, light control module reads the resistance of the incondesent bulb and when the resistance is less then the set value it declares it at fault and shows a code. It thinks it broke and let's you know.
Solution. Search ebay for the resistor that you can put in the line to trick the lcm or pay your local Volvo dealer to reprogram the lcm.

 

Look up ohm's law. By using that formula you can calculate the resistance of a "regular" bulb and then see if the ebay offering is suitable.

 

To Quote Nuke E on the rvnetwork "as long as the LCM sees a load between about 10W and 80W, it's happy"

 

your dealers a scam. I have stood there with my volvo tech and changed all the voltage monitoring parameters because I was installing hid headlights and led markers etc. was done in 10 minutes, that dealerships a scam.

one problem is the system has to be working proper to change a parameter, meaning the original bulb must be connected.


I can't remember if the normal bulbs a 1156 or not but if it is a 1156 is 27w 13v.. that should help you find the right resistor. the volvo lcm is very picky.

 

I remember when you have led parking lights style on the end of the frame the truck is equipped with a harness who contain a diode because without this when it complete dark it possible you can see a very little bright lite in the middle of the parking light.
Hope this can help.
Ben