The diagram often shows a white wire labeled "Park Kill." This is an input that detects when the vehicle is in Park. If left unconnected, your warning lights might automatically shut off when you stop at a scene. Connect this to the vehicle's Park/Neutral position switch if required by your department policy.

: Users frequently seek help for "communication errors" or finding pinouts for custom shop-made cables. Retailers like J. Perry Lighting still offer compatible interconnect harnesses. To help you find the exact diagram you need, Install Guides - Whelen Engineering

has been largely replaced by newer models like the CenCom Core , its robust Amplifier/Relay Module (ARM) design remains a staple for many departments. Key Wiring Components