TM 10-4610-241-24
TO 40W4-13-42
Table 2-2. Unit Troubleshooting - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TRAILER ELECTRICAL SYSTEM (Models WPES-10 and H-9518-1) - continued.
Step 3.
Check for damaged or loose light and in-line connectors.
a.
If loose, tighten them.
b.
If damaged, replace trailer cable assembly (Paragraph 2-81), wiring harness’s (Paragraph 2-82) or light
assemblies, (Paragraph 2-80), whichever is damaged.
Step 4.
Disconnect in line connectors and check for 24 VDC at each trailer cable connector while operating the
required controls on the towing vehicle.
a.
If voltage is absent on any plug, replace trailer cable assembly (Paragraph 2-8 1)
Step 5.
Reconnect in line connectors and disconnect light connectors. Check for 24 VDC at each trailer cable
connector while operating the required controls on the towing vehicle.
a.
If voltage is absent on any wiring harness plug, replace wiring harness assembly. Refer to Paragraph
2-82)
b.
If voltage is measured on each plug, replace light assembly (Paragraph 2-80).
2-70 Change 1
