TM 10-3930-669-20 1.  SERVICE BRAKES DO NOT APPLY OR APPLY SLOWLY (CONT). KNOWN INFO TEST OPTIONS Transmission temperature normal. Hom operates. Brake fluid level correct. Drive axle OK. Brake discs OK. Brake linkage adjustment correct. Master cylinder OK. Master cylinder pressure switch OK. Transmission inching valve OK. Voltage test. STE/ICE-R #89. POSSIBLE PROBLEMS REASON FOR QUESTION Wire 27A faulty. Relay R9 ground wire faulty. Wire 27 faulty. Wire 27B faulty. Relay R9 faulty. If  22  to  24  vdc  are  not  present, wire 27A is faulty. KNOWN INFO TEST OPTIONS Transmission temperature normal. Hom operates. Brake fluid level correct. Drive axle OK. Brake discs OK. Brake linkage adjustment correct. Master cylinder OK. Master cylinder pressure switch OK. Transmission inching valve OK. Wire 27A OK. Continuity test. STE/ICE-R #91. POSSIBLE PROBLEMS REASON FOR QUESTION Relay R9 ground wire faulty. Wire 27 faulty. Wire 27B faulty. Relay R9 faulty. If  continuity  is  not  present,  relay R9 ground wire is faulty. ¬ ¬ 2-402