Hello, 2010 Accord EX-L, trying to install a high beam headlight flasher module. My son is a volunteer fire fighter and wants to be able to have the high beams flash. Wheelen and Federal Signal offer universal modules. One for positive switched headlights and one for negative switched. Neither company has the technical data to tell me what my 2010 Accord EX-L has. Has anyone done this before? Can you offer any insight? Thanks

 

At the relay for the headlamp it is ground switched. The relay passes 12 volt to the bulb.

So both? Depending on where you do your switching for the flash. I suspect the flashing unit controls the relays and does not switch the high current to the bulb. Ground side switch would make the most sense.