I have an 89 K1500 with a fisher plow and a blinker problem.
If I turn on just the blinker, with no headlights, it works fine and the amp meter on the dash moves down slightly each time the blinker comes on. If I turn the headlights on, the meter drops just a tiny bit, then returns to where it was before the headlights came on. At this point, the blinker slows down slightly and the amp meter continues to move with the blinker, like it was before. Now, if I turn the plow lights on, the meter doesn't drop at all and continues to move exactly as before, but the blinker slows considerably, to like once every second or so.
I don't really know that much about auto mechanics, but here is my take on the situation.
I thought about changing the turn signal flasher, but it seemed like if that was the issue, it would not be effected by the headlights or plow lights...?
Next, I thought that maybe there wasn't enough power getting to the lights and blinkers. If this was the case, however, I would think that the amp meter would have a noticably larger drop when the lights were on.
Then I thought....ok, that is as far as I got, no more ideas. So, I was hoping someone here could point me in the right direction. Was I on the right track with one of my theories, or should I be looking somewhere else? Any thoughts or suggestions would be greatly appreciated.
Kevin