[Threshold]

Try this:

Код:

CMD:neon(playerid, params[])
{
    if(IsPlayerInAnyVehicle(playerid))
    {
        if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
        {
            new vehid = GetPlayerVehicleID(playerid);
            if(PlayerVehicleInfo[playerid][vehid][pvNeon] >= 1)
            {
                if(Neon[vehid] == 1)
                {
                    UnloadNeon(playerid, vehid);
                    SendClientMessageEx(playerid, COLOR_GREY, "Neon turned off.");
                    Neon[vehid] = 0;
                }
                else if(Neon[vehid] == 0)
                {
                    LoadNeon(playerid, vehid);
                    SendClientMessageEx(playerid, COLOR_GREY, "Neon turned on.");
                    Neon[vehid] = 1;
                }
            }
            else return SendClientMessageEx(playerid, COLOR_GREY, "This vehicle doesn't have neon!");
        }
        else return SendClientMessageEx(playerid, COLOR_GREY, "You are not the driver!");
    }
    else return SendClientMessageEx(playerid, COLOR_GREY, "You are not inside a Vehicle!");
    return 1;
}

Where did you go wrong?

Код:

 if(Neon[vehid] == 1)
                {
                    UnloadNeon(playerid, vehid);
                    SendClientMessageEx(playerid, COLOR_GREY, "Neon turned off.");
                    Neon[vehid] = 0;
                }
                else if(Neon[vehid] == 0)
                {
                    LoadNeon(playerid, vehid);
                    SendClientMessageEx(playerid, COLOR_GREY, "Neon turned on.");
                    Neon[vehid] = 1;
                }

You use else instead of an else if statement, otherwise you would be setting the variable to 0, therefore the code just resets.