Installing Aftermarket Radio: Dimmer or Illumination Wire from Harness to Radio?

Hello, I've seen similar threads to this one, but am still confused, so here I am.

I recently bought a 2007 Tacoma and am going to replace the factory radio with an aftermarket radio. I have all the parts needed. I am having a problem determining whether to use the Dimmer or Illumination wire from the harness to the radio. The head unit is a Sony XAV-AX5000. The wiring harness is a

$8 Metra 70-1761 Radio Wiring Harness For Toyota 87-Up Power 4 Speaker

Metra 70-1761.

The issue is:

- The metra harness lists the Illumination wire as orange
- The metra harness lists the Dimmer wire as orange/white

- The radio lists the Illumination wire as orange/white
- The radio does NOT have a wire listed as a Dimmer wire, nor is there an orange wire.

NOTE: To clarify the issue, the Illumination/Dimmer wire color schemes do not match.

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My goal is: to have the radio dimm when the headlights are turned on.

My question is: Should I connect the orange wire from the harness to the orange/white wire on the radio? Or should I connect the orange/white wire from the harness to the orange/white wire on the radio?

My initial instinct would be to first try connecting the orange wire from the harness to the orange/white wire on the radio, since both are listed as "Illumination". If that does not work, then I would try connecting the orange/white from the harness to the orange/white on the radio.

I don't think testing either scenario should cause any issues and can easily be swapped if needed, but I thought I would check here first. Any advice is greatly appreciated.

Thanks in advance!

 

use the Illumination wire

 

Use the illumination wire, it should be on the main harness. There is sometimes an orange/black on the small plug of the Metra harness, the one that has green and purple speaker outs. That’s dinner.

You want orange illumination on the big plug.