HYDRAULIC SUSPENSION LOCKOUT WILL NOT ENGAGE (HMMH) (REG. NO. UC053E THRU UC053K) cont'd -680640372

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

Step 15. Check wire (19) at indicator light (18) for continuity to ground.

If short to ground, replace lamp (20) by removing nut and lens

assembly (21 ) and lamp.

if open to ground, go to step 16.

Step 16. Check wire (19) at motor relay (22) for continuity to ground.

If open to ground, go to step 48.

If short to ground, repair wiring (19) between motor relay and

indicator light.

Step 17. Check for +24 VDC between wire (23) and ground at connector AB (24).

If +24 VDC is not present, repair wiring (23) between indicator

light and connector AB.

If +24 VDC is present, go to step 18.

Step 18. Check for +24 VDC between wire (23) and ground at pin 10 of cab floor

separation point (25).

If +24 VDC is not present, repair wiring (23) between

connector AB and cab floor separation point.

If +24 VDC is present, go to step 19.

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