Join Date: Mar 2002
Location: Austin, TX, USA
I agree with Jim. Check the voltage at the wiper motor. There is probably a little corrosion on the wiper motor and firewall conectors in addition to the fuse and switch. Those little bits of corrosion add up to a resistance in the circuit. Combine that with 30 years of grease inside that is probably getting dried up and you'll have slow wipers. So it's probably a combination of things. A voltage check is a good first step.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI