TM-9-2320-334-13&P LHST Operator, Field and Parts Manual M1147A1 Trailer Download
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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 - Continued. Change 1 0029 00-4 INDICATION/CONDITION DECISION (NO/YES) PROCEDURAL STEPS 3. Is 18-30 VDC present at TL257? No. Repair wire or replace voltage converter box (WP 0058 00). 1. Set multimeter to VDC. Yes. Repair wire 104 (EM 0195) or replace main electrical harness (WP 0066 00). 2. Connect intervehicular cable connector to 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 TL257. 5. Connect negative (-) probe of multimeter to a known good ground and note reading on multimeter. END OF WORK PACKAGE