How do you hook up an aftermarket radio without a harness?

5:5519:55How To Install A Radio Without A Wiring Harness Adapter - YouTubeYouTubeStart of suggested clipEnd of suggested clipPower take the red wire twist. It together with your accessory wire that you found on the vehicle.MorePower take the red wire twist. It together with your accessory wire that you found on the vehicle. And go ahead and twist those together.

Do you need a wiring harness for an aftermarket radio?

If your vehicle has (or once had) a factory stereo, or if it was pre-wired with a stereo prep package, there should be at least one plastic wiring harness behind the stereo opening. This plug connects the stereo to your vehicles electrical system and the speakers.

Do I have to connect the illumination wire?

The illumination wire adjusts the brightness of the display on an aftermarket radios faceplate. This is not mandatory for proper stereo operation, so many installers leave it unhooked for maximum display brightness.

Do all aftermarket radios have the same plug?

All aftermarket car stereos can use the same car stereo wiring harness, but it all depends on what the owner of the vehicle wants to do for one main reason.

Can I use my steering wheel controls with an aftermarket stereo?

This subject is a little complicated, but the basic answer is that, no, you cant connect steering wheel audio controls to an aftermarket radio without an adapter. In most cases, though, an adapter is required.

Can I connect yellow and red wires together?

Yellow shoudl be hot all the time, red should trigger on when the ignition is on. I would not wire the yellow and red together, it is a given youll leave the h.u. on and drain your battery.