Turn-signal dash light won't go off
My left turn-signal dash light (arrow) has decided to stay on even when not using that blinker. It flashes correctly when I do use that blinker, and the tail lights blink properly as well. Even though the dash light stays on, the tail lights on that side do not stay in the brighter "on" position. Where should I look first to try and figure out why this is staying on? Thank you in advance for your input.
1969 RS coupe Glacier Blue, GM HO 350 crate, 4-speed Muncie, ceramic Hooker headers, 3" Flowmasters, 10-bolt posi w/ 3/42's, Hotchkis suspension front/back, Bilstein shocks, multileafs, black factory interior, woodgrain dash, black Procar Rally seats.