TR6 wiper

[Jack W Drews <vinttr4@geneseo.net>]

The windshield wiper on my newly acquired TR6 goes at one speed instead
of two. Low speed works fine, high speed does not.

Before I tear into it, do my fellow listers know if there is a common
fault that causes this?
-- 
uncle jack
61 TR4 Rallye Replica Racer
71 TR6 Street Car named Desire