I used a standard bosch type automotive relay. The SPDT (single poll, double throw) will have 5 terminals on it instead of 4 that everyone is used to. You can find them at most electronics stores, auto parts stores or places like summit, jegs, etc. Sorry no pics. I installed every thing to be hidden/look factory so I would have to pull a bunch of stuff apart to take pics. It is really hard to tell I have them just by looking under the hood. Wired: terminal number: 85= ground, 86= tapped into the high beam wire, 30= low beam wire from vehicle, 87a= low beam wire from hi/low module. When the high beams are energized, the relay will also be energized and cut power to the low beams. This will enable the module to now switch from low to high. When the high beams are de-energized, the relay will close and power will be restored to the low beams.
So, the way I read this, with that installed, the flash to pass becomes a momentary on toggle, which turns off teh low beams. While that is a workaround, it is also not the way flash to pass works. Flash to pass activates the high beams, regardless of whether the lows are on or off.
So if you flash to pass during the day, just the hi-beams should come on, if you flash to pass at night, the highs come on with the lows still on.