81 Z28 left turn signal up front doesn't come on when head lights or parking lights are on and the left turn signal on the dash lights up too even though the turn signal is not engaged. I replaced the turn signal switch which did not fix it. This is what happens. When I try to use the turn signals whether the head lights / parking lights are on or not it only flashes to the right. With head lights parking lights on the front left turn signal doesn't even light up. But with the head light parking light off it will at least light up when I signal left. The last weird thing. With no head lights parking lights you hit the hazard button and all four work like they're supposed to. You turn on head light parking light and the backs keep going as normal but if front blinkers start alternating like a disco. Any thoughts? When are the front side lamp markers supposed to come on? Neither one of those light up.