I need to add a flasher system for my 2019 f150 in order to comply with dot safety requirements while working road construction. Anyone have any recommendations or experience with these devices?

 

Check out this thread. PM tvsjr and he will probably be glad to help you.

https://www.f150forum.com/f118/traff...dation-489421/

 

I replied to his PM, but just for anyone else that comes across this thread... any of the "plug in" OBD-based flashers are *crap*. They exploit test modes in the BCM, which were meant for turn lamp on, yes it works, turn lamp off, to flash those same lights 60-90 times a minute. As a result, you risk toasting a BCM and you get flash patterns that look like a retarded monkey is banging on a bunch of switches.

For his application, doing some simple road construction stuff, your best bet is a directional stick high in the rear window and a couple amber LEDs mounted below the tailgate. You can scale up from there, depending on your needs.