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Page Title: HYDRAULIC SUSPENSION LOCKOUT WILL NOT ENGAGE (HMMH) (REG. NO. UC053E THRU UC053K) cont'd
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TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
Step 45. Check for +24 VDC between wire (52) and ground at cab floor separation
point (25).
If +24 VDC is not present, repair wiring (52) between hydraulic
switch and cab floor separation point.
If +24 VDC is present, go to step 46.
Step 46. Check for +24 VDC between wire (52) and ground at connector AA (48).
If +24 VDC is not present, repair wiring (52) between cab floor
separation point and connector AA.
If +24 VDC is present, go to step 47.
Step 47. Check for +24 VDC between wire (52) and ground at motor relay (22).
If +24 VDC is not present, repair wiring (52) between
connector AA and motor relay.
If +24 VDC is present, go to step 48.
Step 48. Check wire (53) at motor relay (22) for continuity to ground.
If short to ground, replace motor relay.
If open to ground, repair wiring (53) between motor relay and
ground.
3-252

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