Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: what is the blue wire for?
Document: Works without a problem, just remember to hook up a switching 12v to the antenna booster blue wire. Easy to connect.
There was no instructions where the blue wire went, but I figured it out. Works great as advertised! Plug and play with my pioneer head unit.
Does exactly what it's supposed to do... My 2008 Honda Accord doesn't have a power antennae (the blue wire coming off of it), so it was unnecessary, but in no way did it impact the functionality.
I put a &#34;T&#34; connector on my red power wire on the wiring harness. I then plugged in the blue wire from this harness to the &#34;T&#34; connector. Works great.
This kit works fine. But there are NO INSTRUCTIONS AT ALL with it, and there is a second blue wire attached to the connector with no indication as to what it does or where it should be connected.On my 2012 Honda Ridgeline, this blue wire MUST be connected to the Remote Out line from your head unit (the wire that remotely turns on external amplifiers or controls power antennas).
At first, I hooked this up with just the antenna part connected & got very few radio stations in my area. I went back & read some reviews on what to do with the blue wire & decided to splice it into the other antenna wire that came out of my stereo & I had already connected to the antenna wire from the harness. I'm not positive this is the best way to do it (it looks like a T or Y), but it has worked for me!
what can I say, this is a basic wiring adapter.I connected it to the blue/white wire for power, though some online reviews seemed to suggest that wouldn't provide enough power for the antenna amplifier. I found recommendations that you wire this directly to the red wire for power, though I did not do this.My radio reception seems ok.2007 Honda Odyssey LX
This fit perfectly on my sisters 2007 Honda Fit.When I first hooked it up I noticed the radio stations wouldn't come in as clear and strong as they should, so I did a little research online. Turns out the blue wire I thought was extra is actually to help the antenna have power so it can pick up stations much stronger. I'm not sure that all Honda's use this wire, but you should always research to be sure.Metra has always had great products and this one is no exception!
Exact adapter I needed to connect Pyle Audio head unit to the antenna in my Honda Pilot 2006 EX-L.  Just connect blue to the Powered Antenna connector from the head unit and it works.
perfect connection long enough wire to reach the headunit i could not complain about anything and it works and keeps the radio working with an aftermarket stereo.
Answer: It wants 12v power wire.