Wipers on = wiper fluid sprays. Always.

[Reese Allen]

1980 C20, bought it a couple of years ago. It's had this problem the whole time I've owned it.

Whenever I turn on the windshield wipers, the wiper fluid pump kicks in and starts spraying in regular pulses. And doesn't stop until I turn the wipers off. I can't have one without the other. If the wipers are on, the pump runs and sprays fluid.

Tonight, I replaced the switch (and also installed an AC Delco pulse wiper module) in the hopes of fixing this problem. It didn't. New switch works the same as the old one, even the pulse/intermittent wipe function works, which is awesome, but the problem I was trying to solve remains.

Any ideas? Wires crossed somewhere? I was sure replacing the switch would do the trick. Not sure where to go from here.