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 499 of 790

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

0022 00--16

APPARENT HDC SYSTEM PROBLEM -- Continued

0022 00

YES

NO

from block 22

NO

NO

30

Is 28 VDC present at input to “Y”--connector

from wiring harness 12357211 coming from

master relay?

Remove “Y” connector (Figure 19, item 1) from

in--line connector (Figure 19, item 2). Power up

vehicle. Check for 28 VDC on “Y”--connector

terminal coming from master relay (wiring

harness 12357211).

29

YES

NO

Troubleshoot portion of

vehicle electrical system

associated with wiring

harness 12357211 coming

from master relay and

repair/replace wiring or

components as necessary.

To block 31

32

Is 28 VDC present at master relay (input) side

of HDC circuit breaker?

To block 35

Shut off vehicle power.