TritonBoulder47 said:
Set them to steady burn and use an external flasher...
This right here. Unless the product tag indicates it's AVNS (S=Sync), then sync features are not built in. But cigarette versions aren't available in sync'd versions anyway. So, like it was said, get an LED flasher, set your flasher patterns to steady, cuts the ends off your Avengers, and hook up the flasher. If you still want it to be able to plug it in, take one of your cut-off cigarette plugs, and wire it to the +12VDC & Ground connections on the flasher.