I bought a retrosound radio to replace an older tape deck. The previous owner had shredded the old harness but I mostly got it back to stock. Hooked up the blue 12v constant, ground, and speakers for both sides.

It requires an additional power for illumination. I can’t seem to figure out ignition switched 12v, so the radio doesn’t turn on. I have a Red-blue, and a green-white left. Checked fuses and still not getting anything on the voltmeter when ignition is on for either wire.

Wouldn’t be surprised if it’s a me problem, but the frustration is rising. Thank you!

Green/White = Positive for gauge lights

Red/Blue = Returns gauge lights to the rheostat (gauge light dimmer)

Blue = Accessory (Key Switched)

Constant power would be come from the cigarette lighter (Blue/White)

Steve, though I’m sure you’re not surprised, it worked! Thank you!

@Mcbtuba Any chance you can post a photo of your install? I like the Retrosound stuff they've been coming out with lately. Might be nice to install one myself.

Absolutely! Will take me a little while, but the quality and sound were great on the test run!