You can use this command into Init vehicles or in scripts-
For police cars and Swatvan (only the marked police cars have all the beacons effects)
to active mode1:
_vehicle setvariable ["lights1on", true];null =[_vehicle] execVM"max_lapd_mod\scripts\crownmode1.sqf";
To deactive:
_vehicle setvariable ["lights1on", false];
to active mode2:
_vehicle setvariable ["lights2on", true];null =[_vehicle] execVM"max_lapd_mod\scripts\crownmode2.sqf";
To deactive:
_vehicle setvariable ["lights2on", false];
to active takedown lights:
_vehicle setvariable ["lights3on", true];null =[_vehicle] execVM"max_lapd_mod\scripts\crownmode3.sqf";
To deactive:
_vehicle setvariable ["lights3on", false];
to active siren:
_vehicle setvariable ["sirenon", true];null =[_vehicle] execVM"max_lapd_mod\scripts\police_siren.sqf";
To deactive:
_vehicle setvariable ["sirenon", false];
to active radio: (only active option)
_vehicle setvariable ["radioon", true];null =[_vehicle] execVM"max_lapd_mod\scripts\police_radio.sqf";
For FBIvan
To active:
_vehicle setvariable ["lights2on", true];null =[_vehicle] execVM"max_lapd_mod\fbi\scripts\crownmode2.sqf";
To deactive:
_vehicle setVariable ["lights2on", false]";
To active:
_vehicle setvariable ["lights1on", true];null =[_vehicle] execVM"max_lapd_mod\fbi\scripts\crownmode1.sqf";
To deactive:
_vehicle setVariable ["lights1on", false]";
To active:
_vehicle setvariable ["sirenon", true];null =[_vehicle] execVM"max_lapd_mod\fbi\scripts\police_siren.sqf";
To deactive:
_vehicle setVariable ["sirenon"", false]";
To active Hazzard lights:
_vehicle setvariable ["lights3on", true];null =[_vehicle] execVM"max_lapd_mod\fbi\scripts\crownmode3.sqf";
to deactive:
_vehicle setVariable ["lights3on", false]";
For FBI Police cars:
To active
_vehicle setvariable ["lights2on", true];null =[_vehicle] execVM"max_lapd_mod\fbi\scripts\fbimode2.sqf";
To deactive
_vehicle setVariable ["lights2on", false]";
To active
_vehicle setvariable ["lights1on", true];null =[_vehicle] execVM"max_lapd_mod\fbi\scripts\fbimode1.sqf";
To deactive
_vehicle setVariable ["lights1on", false]";
the siren the same FBIvan
Secret Service Tahoe:
To active
_vehicle setvariable ["lights2on", true];null =[_vehicle] execVM"max_lapd_mod\fbi\scripts\fbimode2undercover.sqf";
To deactive
_vehicle setVariable ["lights2on", false]";
To active
_vehicle setvariable ["lights1on", true];null =[_vehicle] execVM"max_lapd_mod\fbi\scripts\fbimode1undercover.sqf";
To deactive
_vehicle setVariable ["lights1on", false]";
the siren the same FBIvan
F.B.I. Charger Undercover:
the same for FBI police cars
Ambulance and Firetruck
To active:
_vehicle setvariable ["lights2on", true];null =[_vehicle] execVM"max_LAPD_mod\ambulance\scripts\crownmode2.sqf";
To deactive:
_vehicle setVariable ["lights2on", false];
To active:
_vehicle setvariable ["lights1on", true];null =[_vehicle] execVM"max_LAPD_mod\ambulance\scripts\crownmode1.sqf";
To deactive:
_vehicle setVariable ["lights1on", false]";
To active siren:
_vehicle setvariable ["sirenon", true];null =[_vehicle] execVM"max_LAPD_mod\ambulance\scripts\police_siren.sqf";
To deactive:
_vehicle setVariable ["sirenon", false]";
To active Hazard lights:
_vehicle setvariable ["lights3on", true];null =[_vehicle] execVM"max_LAPD_mod\ambulance\scripts\crownmode3.sqf";
To deactive:
_vehicle setVariable ["lights3on", false]";