Signal from light switch control
 

I plan to install a ledbar behind the bumper grille to aid with some more visibility driving highway at night. I wanna make it a bit more OEM hence bought a light switch off ebay with rear foglight button (mine only came with front fog and dimmer originally).

I will wire the ledbar via a relay with intention to use the rear fog button as a trigger. Do you know if that button sends a positive or negate pulse since from diagram, it is pin #9 and goes straight to footwell module FRM.

Appreciate any guidance and sharing on this.

Thanks