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  RIGHT STOPLIGHT DOES NOT ILLUMINATE-Continued 0022 00  ELECTRICAL SYSTEM TROUBLESHOOTING - Continued  Table 1. Right Stoplight Does Not Illuminate - Continued.  0022 00-5 Change 1  INDICATION/CONDITION DECISION (NO/YES) PROCEDURAL STEPS  4. Is 8-14 VDC present at  terminal lug TL252A?  No. Repair wire 110 (EM 0195)  or replace main electrical  harness (WP 0066 00).  1. Set multimeter to VDC.  Yes. Go to (Indication/Condition  5).  2. Remove two screws and  cover from junction box.  3. Connect positive (+) probe  of multimeter to terminal lug  TL252A.  4. Connect negative (-) probe  of multimeter to a known  good ground.  5. Position main light switch on  towing vehicle to STOP  LIGHT.  6. Depress brake pedal and  note reading on multimeter.  7. Position main light switch to  ALL OFF.