(Always looking for good photo examples of Idaho State Police Mustangs. Feel free to contact the Admin HERE.)
The Idaho State Police Mustangs did not have lightbars.
These car were equipped with a halogen dash light, and it is believed ISP used the Whelen Responder.
Rear Deck Lights:
These cars were equipped with Sho-Me amber halogen lights on the rear window deck.
(Amber (more yellow than this) Sho-Me lights with a chrome housing)
These cars were equipped with a chrome spotlight..
It is believes that the 1983 Mustang used the Unitrol 800 siren. There is also some that believe the Idaho cars used the Whelen WS-295 siren. It could be that the 1983 was Unitrol, and the 1986 was a Whelen. Hopefully someone will be able to shed more light on this.
(Unitrol 800 Siren)
(Whelen WS-295 Siren)
Motorola Micor radio
(Motorola Micor shown below a Unitrol 800 siren)
It has also been suggested that the Idaho cars used a GE Phoenix radio. If so, it would like have been one of these:
Looking at this photo of a Idaho SSP Mustang, you can see the blue dash light, radar counting unit (display unit), and the antenna just behind the spotlight.
Blowing up the photo a little, you can clearly see the radar antenna is a grayish color with black striping that widens towards the front like a cone.
The MPH K-Band radar is the only antenna with those colors that widens like that, which would indicate that this car was equipped with a K-55 K-Band radar unit.