Ant - part of the decision depends on if you want them to light up with the engine off. Run from the fuse box will allow them to be switched on if the ignition is on. Running from the low beam will only allow operation if the engine is running (and the low beams are lit).AntRT said:
Also, I don't know if the CanBUS circuit would read a high amp fault powering both the headlamps and the PIAAs off the low beam circuit.
I run every accessory back to the fuse box, that way there's a single line of power I can follow (and isolate). Simple minds appreciate simple things, and minds don't get much simpler than mine.
JayJay