The blue is coming from small part #171b3940 (which I guess is also an scr?) the purple is coming out of the big unit marked ev-100 scr
So, the blue wire could control issue of intermittent forward & rerverse?? I will double check the point of attachment at wire harness plug into control panel, could issue be the small scr part#171b3940?
Are wire harness replacement plugs available on line?
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