TM 10-3930-659-20 6-30. BRAKE LIGHT SWITCH REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Tools/Test Equipment: •     Battery disconnect switch in OFF position (see • General mechanic's tool kit (Item 44, Appendix F) TM 10-3930-659-10). •    Front and left side cab skirts removed (see para- References: graph 14-6). • TM 10-3930-659-10 a. REMOVAL WARNING Pressure  stored  In  accumulator  Is  approximately  500  psi  (3448  kPa).    Ensure that accumulator pressure is relieved before removing service brake hoses or components.    Failure  to  follow  this  warning  may  result  in  serious  Injury  or death to personnel. NOTE •  It  is  necessary  to  hold  boot  of  one  brake  pedal  with  hand  while  opposite brake pedal Is pumped.  Movement Inside boot will be felt as opposite brake pedal Is pumped. Accumulator pressure Is relieved when movement stops. • Each brake pedal should be pumped a full 75 times even If no movement Is felt after pumping brake pedal several times. 1. Hold  boot  (3)  of  left  brake  pedal  (4)  with  hand and   pump   right   brake   pedal   (1)   75   times. Release boot. 2. Hold boot (2) of right brake pedal (1) with hand and    pump    left    brake    pedal    (4)    75    times. Release boot. TA707811 6-125