Quote:
Originally Posted by BigB_117
Thanks for the reply.
Subaru’s dimmer system really is an odd one.
Knowing that the factory footwell lighting kit dims with the instruments I looked it up.
It appears that it ties into the hazard lights button and clock circuit.
Looking at pictures of it, the wires don’t make any sense. There appears to be 3 wires going to each led harness.
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Not strange at all. They're tapping into that same ILL wire that everything else uses. Remember, the hazard button lights up at night and the clock dims slightly, so they use that same circuit that everything else does as the signal or source. They just chose to make a harness for that connector to get at it, that's all.
The kit you linked only has 2 wires to each LED, as it should be. Yellow and black. It's doing exactly what I suggested you test, using the ILL circuit as a trigger, and the ground circuit that goes into the dial as the dim setting.
The only thing I don't personally like is that it's using the ILL circuit as the 12v power source, but LEDs have such low draw that it isn't really an issue and it's OEM, so it's engineered to work as is. I like to isolate DIYs from that circuit to their own fuse so if something I do shorts out, it only blows the fuse for the DIY stuff and not anything factory.