HYDRAULIC SUSPENSION LOCKOUT WILL NOT ENGAGE (HMMH) (REG. NO. UC053E THRU UC053K) cont'd -680640382

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