Went back and looked. No relay. The turn signals are controlled from the Light Switch Module (LSM).
Here is a rough looking schematic of the circuit.
Unless your LSM is bad (most unlikely) you have a burnt bulb or a bulb on the way out and it's resistance is off so the LSM is reporting a bad bulb.
How does something immoral, when done privately, become moral when it is done collectively?
Furthermore, does legality establish morality?
Slavery was legal; apartheid was legal; Stalinist, Nazi, and Maoist purges were legal. Clearly, the fact of legality does not justify these crimes. Legality, alone, cannot be the talisman of morel people. - Walter E. Williams