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I read that the 12v ACC wire does not work when installing an after market HU, but what about the illumination wire? If using a wiring harness adaptor wired to the new HU wiring harness does the Illumination wire still get power, or am I gonna have to go to the HVAC harness and tap into that?
I haven't tried to use the illumination wire in the radio harness... not sure if it works or not.
As found in the C5 FAQ:
Posted by ScottFX:
from 14U2ENV:
I found an illumination wire in the HVAC control plug. It is the cream colored wire in the end slot. (disregard the red dot on the wire, I slipped with the probe )