You need the federal Signal current loop to serial adapter aka, the "touch screen" adapter and a custom RS-232 interface cable to the XTL.
The attached manual should get you going.
That vision was retrofitted by a movie police car company in Toronto, I recognize it. It didn't have to be pretty, it just had to look kind OK in the background.
For Sale is a Whelen CANtrol Generation 2 light and siren control system. This is used, but in excellent condition. Build date of 10/16 so still under warranty on the AMP.
CANWC1 with CANCTL1 control head
Eight 10Amp Programable Outputs
Thirty-two 2.5AMP Programable Outputs
Drives a Single or...
Here is another angle without the fake light flare. Link to photographers shutterstock account.
https://www.shutterstock.com/image-photo/police-car-on-street-close-1079753300
Looks like he is in Russia.
For Sale Pair of D&R Electronics Magnum F2 light and siren control units
These units are front panel programmable and can be used to flash any output relay and activate any relay sequence on Master. These are generally console mounted. All input/output power connectors are included...
For Sale is a Whelen CANtrol Generation 2 light and siren control system. This is used, but in excellent condition.
CANWC1 with CANCTL1 control head
Eight 10Amp Programable Outputs
Thirty-two 2.5AMP Programable Outputs
Drives a Single or Dual 100 Watt Sirens
Three 250mA Outputs
Traffic...
Looks like the ambulances are built by tri-star, and leased to EHS.
From their literature, and the photos on their website, the flasher looks to be integrated into their in house built systems.
This is just a guess based on some cursory googling...
For sale is a Whelen liberty 54" WeCan in Amber/White and Amber/Red to the rear
The bar itself is dated 01/11, the I/O board was updated to a newer board dated 11/13 to support all the newer flash patterns, including steadyflash.
The corners were replaced with extended LIN18 corners in...