[Doug Tatham]

It doesn't sound like a typical short, which is good since they are hard to find. It sounds more like the wrong bulbs are installed or the bulbs are installed incorrectly. If you look at the sides of some bulbs they have posts. Usually they aren't the same distance from the bottom of the bulb. You need to make sure that the bulbs aren't rotated 180 off when you install. Several bulbs have two filaments, one for parking lights, one for blinking. If the blinking filament is out, the other will still light up when the lights are turned on. If one bulb is burnt out it will cause the blinkers to go quickly. Check your bulbs make sure they are good, the correct ones, and installed correctly.