<VV> directional problem 1969 HELP

[Michael Kovacs]

1969 500 181,000 miles, original unrepaired drive train. winter beater.
right directional works, very slow blinking.left direction bulbs and indicator light up, but will not flash
emergency flasher works, proof bulbs and wireing to them is OK.
all bulbs good
replaced the flasher, that is not the problemdisconnected the wire harness from steering column. No corrosion at all.key buzzer and horn work.parking lights work
 Should I suspect the contact inside the steering column? I dont like taking that apart till all other options are exhausted.
mike