Here are both wiring diagrams for the 1872 and 2186. that will get you off to a start, but you need to check if the wire for the ignition goes to the proper states to start and turn off.
1872.jpg
2186.jpg
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1989 - Cub Cadet 1772
1987 - Cub Cadet 1572 w/Rear PTO & Cat. 0
38" Lawn Sweeper #196483
42" L42 (Bush Hog) Rotary Cutter # 190349
45" 2-Stage Snowblower # 196364
48" Haban Rotortiller Rear PTO Driven #190356
54" SnowBlade with hydraulic Angle #196376
60" Haban Mowing Deck #196374
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