TM-5-2350-378-24-P

HYDRAULIC DIAGNOSTIC CENTER (HDC) SUPPORTING ARMORED COMBAT EARTHMOVER (ACE), M9

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

TM-5-2350-378-24-P - Page 497 of 790

TM 5--2350--378--24&P

0022 00--14

APPARENT HDC SYSTEM PROBLEM -- Continued

0022 00

YES

NO

from block 15

24

Does continuity exist between parking brake

terminal B1 and power cable connector pin

W1J1--A?

Perform continuity check between parking

brake relay terminal B1 and power cable

connector pin W1J1--A.

YES

NO

NO

22

Is 28 VDC present on parking brake relay

terminal B2?

Check for 28 VDC on parking brake relay

terminal B2.

NO

NO

YES

NO

21

YES

NO

Replace parking brake relay

(TM 5--2350--262--20--2).

To block 29

23

Is 28 VDC present on parking brake relay

terminal B1?

Check for 28 VDC on parking brake relay

terminal B1.

Replace power cable W1

(WP 0028 00).

26

25

Does a short circuit exist in power cable W1?

Check power cable W1 for short circuit from

W1J1--A to connector W1J1 shell or other pins.

Replace power cable W1 (WP 0028 00).

27

28

Check terminals, tighten wiring and replace

parking brake relay if defective.

Check for loose or damaged terminals B1 and

B2 on parking brake relay.