just bought a 74 duster everthing seems to work except the wipers, when the switch is activated the passenger side wiper will twitch , then nothing, the drivers doesn't seem to move at all-- any suggestions? thanks

Something like that happened to me, It was wiper´s motor that was ruined, at first they barely moved when started, after that moved normally.
at second only drivers wiper moved, and passenger not
at third and last, none moved.

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Mopar Muscle is well defend by Slant Six!

Valiant Duster 1971