Just developed an issue with my '73. Drove it yesterday for the 1st time in about a month and when using the left turn signal, the indicator in the dash illuminated solid as if one of the turn signals were blown. Went out to check it out today and when I turned on the left turn signal, it began working but flashing slightly more rapidly than usual. I also noticed that the left side indicator lamps have begun flashing in alternation with the left turn signals (as the flashing signal goes out, the