TM-5-2350-378-23-P

ARMORED COMBAT EARTHMOVER (ACE), M9; HYDRAULIC DIAGNOSTIC CENTER

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JUNE 2012

TM-5-2350-378-23-P - Page 323 of 644

APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued

STEP

12.

Check for 28 VDC on parking brake relay terminal B1 (Figure 14).

PARKING BRAKE

RELAY

B2 (PARTIALLY HIDDEN)

B1 (HIDDEN)

TERMINAL B1 (TOP)

POWER CABLE ASSEMBLY

W1CONNECTION

(LABELED 1070)FROM W1J1-A

T01914HDC

TERMINAL B2 (BOTTOM)

TO HDC CIRCUIT BREAKER

VIA LEAD ASSEMBLY

12496958(LABELED 1070)

1

A1

A3

A2

B1

B3

B2

X1

X2

Figure 14.

Hydraulic Diagnostic Center (HDC) Power Cable Assembly W1 Connection to Parking Brake Relay.

CONDITION/INDICATION

Is 28 VDC present on parking brake relay terminal B1?

DECISION

YES - Go to Step (14).

NO - Go to Step (13).

STEP

13.

Check for 28 VDC on parking brake relay terminal B2.

CONDITION/INDICATION

Is 28 VDC present on parking brake relay terminal B2?

DECISION

YES - Replace parking brake relay (TM 5-2350-262-20).

NO - Go to Step (16).

TM 5-2350-378-23&P

0021

0021-11