Hydraulic Suspension LOCKOUT WILL NOT ENGAGE (HMMH). cont'd -680640349

5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

Step 3. Check for +24 VDC between wire 286 (6) and ground at D+ relay (7).

If +24 VDC is not present, go to step 37.

If +24 VDC is present, go to step 4.

Step 4. Check for +24 VDC between wire 712 (8) and ground at control switch (5).

If +24 VDC is not present, go to step 21.

If +24 VDC is present, go to step 5.

Step 5. While holding control switch (5) completely out, check for +24 VDC between

wire 714 (9) and ground at control switch.

If +24 VDC is not present, replace control switch (5) by

removing wire 712 (8), wire 714 (9), wire 713 (10), knob (11),

nut (12), and control switch.

If +24 VDC is present, release control switch and go to step 6.

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