Google Pixel Audio Car Aux Static Spike With Turn Signal

So I've seen a lot of posts of audio issues with the Pixel and aux cables. I too experience the static with the volume around 50-60% device volume but I have to crank my sterio to hear the music on the freeway. But when I use my turn signal, the static spikes even louder than the music. A few times it has scared the crap out of me! Any idea how the turn signal can be picked up by my phone in the audio jack and spike static through the speakers?