TM 10-6640-215-13 4-26.  REMOVE/INSTALL ENVIRONMENTAL CONTROL UNIT REMOTE CONTROLS - continued. b. Install new ECU remote control by installing eight screws, flatwasher, lockwashers, and nuts. c. Turn on appropriate circuit breaker on Power Panel No.  2. d. Test and verify proper operation of ECU. 4-27.  REMOVE/INSTALL MOTOR CONTROLLERS.  | This task covers: a.  Removal b.  Installation INITIAL SET-UP: Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) General Safety Instructions WARNING ELECTRICAL SHOCK Before performing any maintenance actions on electrical equipment, ensure all electrical power has been turned off.  Death or serious injury may occur from failure to do this. REMOVAL Remove Motor Controller (Typical).  See figure 4-16. a. Open the appropriate circuit breaker on Power Panel No.  2. b. Loosen  captive  screw  and  remove  controller  cover.    Tag  for  reconnection-and  disconnect  motor  controller electrically. c. Loosen strain relief. d. Remove three screws that secure motor controller to wall. e. Remove defective motor controller. INSTALLATION Install Motor Controller (Typical).  See figure 4-16. a. Place motor controller in position on wall.  Install screws. 4-60