No parts drawing number drawing No. 1 DZ9200581021< reference mam-220! --   -- >; horn rocker switch conversion 2 DZ9200581022 3 DZ9200581023 4 DZ9200581024 exhaust brake rocker switch; 5 DZ9200581025 6 DZ9200581026<;! --   -- >; PTO choice rocker switch (small airlines JK937/022) 7 DZ9200581028 reset switch & nbsp; 8 DZ9200581029