I have the same symptoms, but a differrent diagnose.

both of the front signals work, but the right one does not light up with the light switch in he parking position as the left one does.

I cleaned the connectors with a fine grit sand paper and swapped the bulbs and fittings from side to side. Still nothing. That made we wonder if there is some other issue...I measured the voltages from pins on both sides: a little over 10V on the left side and nothing on the right side.

I have not checked if there are more than two leads (positive and ground) going to the signal/side marker, but i suspect not. So there must be a light cotrol module somewhere in this car.

Any thoughts?