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1st Gen Ram Tech'93 & older Rams: This section is for TECHNICAL discussions only, that involve 1993 Rams and older. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
My 1987 Dodge W250 wiper arm and does not have a locking mechanism to hold it locked up. A simple tool can be made that inserts in the wiper arm mechanism and locks it open. It is then relatively easy to slip the arm off and on the mounting post.