[Threshold]

Vehicles are on by default. As long as you aren't using SetVehicleParamsEx under OnPlayerStateChange or OnPlayerEnterVehicle, you shouldn't have a problem with the engine being disabled.

pawn Код:

CMD:lights(playerid, params[]) 
{ 
    if(GetPlayerState(playerid) != PLAYER_STATE_DRIVER) return SendClientMessage(playerid, COLOR_RED, "Error: You are not in the drivers seat of any vehicle.");
    new vehicleid = GetPlayerVehicleID(playerid), engine, lights, alarm, doors, bonnet, boot, objective; 
    GetVehicleParamsEx(vehicleid, engine, lights, alarm, doors, bonnet, boot, objective); 
    SetVehicleParamsEx(vehicleid, engine, (lights) ? (0) : (1), alarm, doors, bonnet, boot, objective); 
    return 1; 
}