I will asume it is a 67 68 or 69 car , and if it is mine did the same thing it was loosing it's ground , on the engine side bolt that hold's the wiper motor to the firewall you will find a small ground plate and a rivet , drill the rivet out and put a small bolt and nut on it , that is my 3 cent's
if it's not a first gen I would not know anything about it anyway
69 camaro traded for 67 camaro traded back for 69 now back with a 67 rs WILL IT NEVER END ,,,,,,,,,,,,,,
I HOPE NOT .
ADVENTURE'S IN RUST REPAIR