latch to a momentary ground

2006 Big Dog K9 Motorcycle

I have "Custom Cycle Controls" "Climax" series controls on my bike

http://www.customcyclecontrols.com/index.cfm/page/ptype=product/product_id=50/category_id=75/home_id=70/mode=prod/prd50.htm

Install Instructions http://www.customcyclecontrols.com/pdf/2nd_generation_climax_controls_install.pdf

they use a relay to activate the Hi/Low beam for the headlights. My Big Dog uses an EHC module and a momentary ground to tell the EHC to perform an action. I do not want to vacate my EHC functions so I need to figure out a way to cause the latch switch to act as a momentary. The "Climax" controls left grip twists forward and backwards to activate the switch. My Service Manual indicates that the BD EHC waits for a Grd pulse and if the Grd is held it simply ignores the grd until the button is released and then pushed again. That being said could I just use the latch switch with the Red lead to the Grd and use the Yellow and Gray leads to attach to the EHC's High and Low beam inputs? I would rather have it be momentary but I am unsure how to create a Latch to Momentary grd circuit. I have looked at the "Latch to Momentary" circuit diagram but it provides a 12v pulse which will not work. And I have looked at the "Single Pulse to Lock and UnLock" but it appears as though you end up with a constant grd anyway. Is there a way to Use the "Single Pulse To Lock and Unlock" circuit but cause it to be a momentary Grd?

I did not read either of your links or the description of what you need.  if you need a device as stated in the subject line, there are 4 different diagrams listed at the top of this list.  Constant to momentary with 4 different input and output configurations.

https://www.the12volt.com/relays/relaydiagrams.asp

https://www.the12volt.com/relays/relaydiagram43.html