Running light interrupt (thanks)switch

Late model pete with the interrupt button on the end of the signal arm has been acting up lately. Push it in sometimes the lights come back sometimes they dont..Yesterday took me a few miles to get them back.
It's under warranty and dealer had time to get it in this morning where they replaced the signal arm but it still doesn't work.. So is there another switch somewhere down the line ??
There's no issue with the lights any other time then when I touch the button so I'm confident the lights aren't shorting out somewhere in the harness..