No Power To Brake Relay No. 1.
Remove harness connector from brake relay No. 1.
Pull parking brake switch up.
Touch positive (+) probe of multimeter to terminal 1 (wire 765-BR).
Touch negative (-) probe of multimeter to good ground.
Turn engine start switch to OFF position (TM 5-3895-379-10).
Turn battery disconnect switch to OFF position (TM 5-3895-379-10).
If 24 to 28 VDC are not measured at terminal 1 (wire 765-BR) and BRAKE fuse is good,
repair or replace wiring and connectors from brake replay No. 1 to parking brake switch
Brake Relay No. 1 Wiring.