I too would say a bad ground on the left light. What happens is the current meant for the left turn signal element also travels through the left parking light bulb which in turn goes across the parallel connection to the right parking light bulb and then to ground. If you happened to remove the right bulb, the left front wouldn't work at all.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!