98 cadillac deville. The right blinker is acting up. Very rarely it works just fine but most of the time it doesnt. If I flip it up to engage the right blinker, it doesnt do anything but the switch itself goes up just fine. If I slowly push it up and hold it at midpoint it works fine sometimes and the other times it just blinks very fast as if one of the bulbs were out. I checked both fuse boxes and all the fuses seem to be fine. I dont think I have a burned out light bulb as sometimes it engages them just fine. I cant figure this out, please help me