| Item | Part No. | Part Name | Qty | Serial No. |
| 0 | SM5651 | PARKING BRAKE RELAY ASSEMBLY - RB4 | | |
| 1 | SM3196 | BREAKER, CIRCUIT - 5 AMP | | |
| 2 | SM3188 | BREAKER, CIRCUIT - 15 AMP, 65VDC | | |
| 3 | SM2162 | PLATE, FACE | | |
| 4 | SM5652 | BOARD, PRINTED CIRCUIT - RB4 | | |
| 5 | SM2163 | PLATE, HOLDDOWN | | |
| 6 | VN7115 | SCREW, MACHINE - #6 - 32NC X 3/8" | | |
| 7 | SM5404 | BOARD, PRINTED CIRCUIT - RB4 | | |
| 8 | SM2158 | ANGLE, MOUNTING | | |
| 9 | SM3189 | RELAY | | |
| 10 | VN7138 | SCREW, MACHINE - #6 - 32NC X 3/4" | | |
| 11 | SM2159 | RAIL, MOUNTING (BOTTOM) | | |
| 12 | SM2161 | RAIL, MOUNTING (TOP) | | |
| 12 | SM3001 | RELAY BOARD - RB6 | | |
| 13 | SM3189 | RELAY | | |
| 14 | VN7115 | SCREW, MACHINE - #6 - 32NC X 3/8" | | |
| 15 | SM2158 | ANGLE, MOUNTING | | |
| 16 | CC6522 | LOCKWASHER - #6 | | |
| 17 | SM5408 | BOARD, PRINTED CIRCUIT - RB6 | | |
| 18 | SM2159 | RAIL, MOUNTING (BOTTOM) | | |
| 18 | | (EFFECTIVE THROUGH A30077.) | | |
