TM-9-2320-334-13&P LHST Operator, Field and Parts Manual M1147A1 Trailer Download
Page 160 of 1184
TM 9-2330-334-13&P BOTH BLACKOUT STOPLIGHTS DO NOT ILLUMINATE-Continued 0029 00 ELECTRICAL SYSTEM TROUBLESHOOTING - Continued Table 1. Both Blackout Stoplights Do Not Illuminate. Change 1 0029 00-2 INDICATION/CONDITION DECISION (NO/YES) PROCEDURAL STEPS 1. Is 18-30 VDC present at intervehicular cable pin F? No. Replace intervehicular cable (WP 0062 00). 1. Set multimeter to VDC. Yes. Go to (Indication/Condition 2). 2. Disconnect intervehicular cable connector from voltage converter box. 3. Position main light switch to B.O. DRIVE on towing vehicle and depress brake pedal. 4. Connect positive (+) probe of multimeter to intervehicular cable pin F. 5. Connect negative (-) probe of multimeter to a known good ground and note reading on multimeter. 6. Position main light switch to ALL OFF.