TM 9-2330-373-14 & P
Table 4-2. Troubleshooting (cont)
TEST OR INSPECTION
ELECTRICAL SYSTEM (cont)
4. DIRECTIONAL SIGNALS INOPERATIVE.
Step 1. Check for defective flasher or switch in towing vehicle.
Replace defective part. See towing vehicle maintenance manual.
Step 2. Check for defective lamp.
Step 3. Check composite light assembly.
Step 4. Inspect for dirty or corroded lamp sockets or contacts.
Remove lamp (para 4-15) and clean sockets and contacts.
5. BRAKES WILL NOT RELEASE.
Step 1. Check to see if brake on towing vehicle is in applied position.
Release towing vehicle brake.
Step 2. Check to see if shutoff valves on towing vehicle are in closed
Open towing vehicle shutoff valves.
Step 3. Check to see if air reservoir drain cock is open.
Close air reservoir drain cock.
Step 4. Check for restrictions in service and emergency air lines, or intervehicular hoses.
Straighten kinks and bends in lines or hoses.