Nope, Just the red and black wire. I have installed alot of grill lights for other firefighters. And these ones were cheaper so I gave them a shot. The only way I know to alternate these ones is to put them on two switch bo
Well it really depends on the lights themselves. Most of the LED lights coming out now have 4 wires from each light head. one will be ground,one power,one pattern selection and one sync wire. With most u need to set them to the same flash pattern and then connect the sync wires together. Sometimes it takes some playing around with it.
i just looked at the galls light i think you have...Im pretty sure what i said will work. I hooked these up on our new brush truck and they alternate just fine.
Central PA here, blair county. I live 4 blocks from the fire hall, so I don't have blue lights. Most guys do. Our dept. policy is you have to be active (make at least 15% of calls annually) to run blue lights. Chief officers can have red lights and sirens. I know one guy that has a full light bar. He lives across the street from the hall. Literally, across the street. He responds to the fire hall on foot. Seriously.