2000 mitsubishi galant

Hey guys I have a 2000 Mitsubishi Galant with the rear window antenna and ever since a got a new stereo system my radio has a lot of static on stations that my stock HU picked up very well. I have already tried a different HU and it still doesn't work so I have come to the conclusion that my antenna wiring has a problem somewhere. I was hoping that one of you guys know how the antenna is wired and where it is wired too.

Did you have to install an antenna adapter with your new stereo?

I would check to make sure the power antenna output (or amp remote turn on output) is hooked up to the factory harness. The wire should be either blue or blue/white.Kevin Pierson

The new HU is a Kenwood KDC-MP745U, and it didn't come with a antenna adapter. My stock HU didn't have one either. For the power antenna output where would i connect it to? This is the wiring diagram for this car. https://www.the12volt.com/installbay/stereodetail/1558.html

That actually a good idea i will try that also. I have a Alpine MRP t220.

I Pulled out the fuse which would stop powering the amp and the radio still gets static.

I think KPierson is right. Are you sure that is the right wire for antenna power that would come from the factory harness?

Did you purchase the wiring harness to install the aftermarket radio?  if so, plug the factory radio back into the vehicle.  Now using a volt meter, check for a wire that has 12 volts on it when the radio is turned on, and has no voltage when the radio is turned off.  If you do find such a wire, there is a real good chance that it is the power wire for the antenna.

The Kenwood HU came with a wiring harness. The antenna power wire will probably be the last one that isn't hooked up if there even is one. My dad is saying that with the galant since its a rear window antenna there is no power antenna wire for it and it goes through the black antenna wire.