Check for dirty or corroded lamp sockets, cable connectors, or harness contacts. Clean as necessary. 4. DIRECTIONAL SIGNALS INOPERATIVE. Step 1. Check for defective flasher or switch in towing vehicle. Replace defective part. Step 2.
|Title||:||Operator's, Organizational, Direct Support, and General Support Maintenance Manual (including Repair Parts and Special Tools Lists) for Semitrailer, Tank, Fuel, 5000 Gallon, 4 Wheel, M131A4 (NSN 2330-00-994-9459) ... Semitrailer, Tank, Fuel Servicing, 5000 Gallon, 4 Wheel, M131A5C (NSN 2330-00-226-6080).|