Does your VX have a afternarket trailer connector? That's been my problem
in the past when I had turn signal issues. My left one came on and just stayed on. No blinking, but right one worked normally. How do they function when the park lamps or headlamps are on? Turned out the convertor that came with the trailer wiring had shorted out.
I do possess a new combo switch. I bought it when they were on back order with no ship date and I found it at another dealer in Kentucky. It was
mis-diagnosed by a local shop as being the combo switch and turned out to
just need a new trailer wiring kit. I kept the switch because it only fits a VX
and you never know.