Gun doesn't have a white button from what I can see but what you say appears correct. Who knows what's going on then. Maybe the gun manufacture set white to always be activated though I can't see what that would prove. This is the gun I have. Bought at a pawn shop for 5 bucks the other day. Likely why it was at the pawn shop. Ah well, it was worth a shot and it still works. Just can't have it plugged in during dashboard time.

Thanks.