[RedFusion]

pawn Code:

new vehicleid = GetPlayerVehicleID(playerid);
if(vehicleid != 0)
{
    new engine,
        lights,
        alarm,
        doors,
        bonnet,
        boot,
        objective;

    GetVehicleParamsEx(vehicleid, engine, lights, alarm, doors, bonnet, boot, objective);
    lights = (lights == 1) (0) : (1);

    SetVehicleParamsEx(vehicleid, engine, lights, alarm, doors, bonnet, boot, objective);
}