I have a virtually mint K1000 body but the meter does not work. It does, however, 'respond'.

As a move the shutter dial the meter needle will either stay all the way to the bottom or go all the way to the top. Shading the lens with my hand does not compromise this movement. What causes this? Obviously, the battery is good and I checked it to be sure. But, with CDS meters, does this occur often? In other words, the meter responds to shutter speed selection ONLY, and not to light. - David Lyga