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My wipers on my 90 302 only work on high. When they stroke, the volt meter drops about 3 volts. The washer pump used to work, but now it doesn't. The wipers are intermittant
I replaced the switch and wiper motor. I also changed out the washer pump with a junkyard one (condition unknown)when I changed out my leaking resovior. No change.
What is left????? The only thing I can think of is a relay, but aren't those all or nothing?