Control Box 156879 156991 for Skyjack Scissor Lift SJIII3215 3219 3220 4620 3226. Product Description: Control Box 156879 156991 for Skyjack Scissor Lift SJIII3215 3219 3220 4620 3226. Part Name :Control Box with Joystick. Part Number :156879, 156991. Item model number? : Skyjack 156879 156991. Direct Replacement :Plug and play, easy to install in your …