He led me on a blind goose chase

This is a mash up of “down a blind alley” and “led on a wild goose chase”, both meaning an unproductive or futile pursuit.  Blind and wild are similar sounding words, so the brain chose the wrong swirling fragment.  This seems to be a common malaphor, based on the many internet hits.   Reminds me of the proverb:  A blind goose is as good as a deaf duck  (ok, I made that up – just trying to be a wise quacker).