cool_as_crap
I'm Awesome
Does it with park lights and headlights on. No other lights backfeed. And the weirdest thing is that my test light didn't light up for the opposite side at my mirror connections.Does it do it with headlights on? Does your grill corner marker do it too? Wondering if it isn't more of a power draw issue than backfeeding.
Could it be corrosion inside the mirrors? That's the only place I haven't checked.usually that points to a short somewhere. Look for corrosion on wire/contacts and/or a bad earth.
A wire brush and some dielectric grease will be your friend