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switching off the signal of a blown light bulb caused by led or possible?
Posted: 23 Oct 2018, 16:02
by misiaczek88on
Can I turn off the burned-out bulb signal caused by Led for the license plate backlight, parking lights, and road and low beam lights? He wants to set up a led and even those with a canbus cause a blown bulb error
Re: switching off the signal of a blown light bulb caused by led or possible?
Posted: 23 Oct 2018, 18:18
by s130
Simple answer is NO!
There is a whole load of misinformation about so called CAN BUS compatible LED replacement lamps.
CAN BUS is irrelevant unless you have a fully integrated light cluster and I've not yet found one of these used in a Fiat or Alfa.
The vehicles body computer makes a simple current measurement (voltage drop across a known resistance value). To keep losses low the known resistance value is low. A standard 10W, 15W, .... etc. bulb/load will draw enough current to generate a measurable voltage across the known resistance to confirm a bulb is present.
LED lamps draw significantly less current and this current is not enough to generate a measurable voltage across the known resistance to confirm a bulb is present. It has NOTHING to do with CAN BUS or CAN BUS compatible marketing.
Replacement LED lamps that are designed to not trigger a vehicle's bulb failure warning use dummy loads inside the LED lamp to draw the required current. These LED lamps may/will be brighter but they will draw the same amount of power from the vehicles systems. This can lead to premature LED light failures because they do no have the dissipation surface areas / capability compared to more traditional lamps.