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2008 CR-V aftermarket receiver: negative illumination?

1230 Views 0 Replies 1 Participant Last post by  duckpond
I almost finished wiring Metra 70-1722 to my Pioneer FH-X720BT, there's one confusion here:

In Metra 70-1722, there's a Orange/Black wire (Pin #9 in below picture) for Negative Illumination:
View attachment 39570

However the Pioneer FH-X720BT does not have a matching wire for purpose, it only has an Orange/White (Pin #22 in below picture) to "Connect to a car’s illumination signal"
View attachment 39578

Should I leave Orange/Black of Metra 70-1722 open or should I connect it to some where else?

Thank you all pals!