I was looking at this for a couple of trucks, like the ambulance. I believe this unit would give siren and flashing light (if i want to add one on the roof) as well as turn signals, brake and back up lights and more, and for $40 it's not totally unreasonable. Our buddy Rad thinks he's cheap, but I just might be the biggest cheapskate ever.

https://www.ebay.com/itm/G-T-POWER-C...k/252718194554

Rad, have you ever tried one of these? I think you could figure it out pretty quick and then teach dummies like me.