Front Turn Signals Burn Out

[SWAV]

The front turn signals in my GX 470 continually burn out.

The dealership has replaced both sockets, but the problem continues to happen.

They told me they are showing a problem (computer diagnostics?), but don't know what it is - just to come back and get the bulbs replaced when they go out (every 1 - 2 weeks) until they can get more information. Does anyone have any info that might help enlighten them?

By the way, I get the sulfur smell mentioned by other users. If I 'punch' the throttle, such as when getting on the highway, the smell is especially noticable. Any further info on that problem?

Thanks for any input.