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A 93 is a 140 which should have a duovalve not a monovalve, which normally you'd think "what's the difference" but the duovalves are a different design and usually are very dependable, no diaphragm to rip.
The 2 small hoses you mention, see if it looks like it leads to the base of the windshield, has a heated bladder at the base which is also heated by the coolant. It keeps the area where the wipers rest on the windshield warm in the winter so the wiper blades don't freeze to the glass.
Gilly
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