bulbs (86 Toyota Pickup).? So just here recently my left turn signal started flashing very quickly as if one of the bulbs burnt out, but all the bulbs are fine. I actually replaced all of the bulbs just to be safe. When I signal left, the front signal flashes very quickly but the left rear does not flash at all. I actually connected a multimeter to the two wires for the rear signal, and to the socket itself and it is getting feed, but I actually can't remember if it was a full 12 volts or not... Also, after trying multiple bulbs, they all sit in the socket snug without any play or lack of connection. I thought maybe the signal relay was bad, but would it be showing a reading on my multimeter if it was? Also, a while before this started happening, my reverse lights on both sides stopped working.