TM 9-2350-287-20-12-19. TROUBLESHOOTING CHART (continued).u. AUXILIARY POWER UNIT (continued).(2) ENGINE FAILS TO CRANK. All other electricalsystems operate (continued).Replace PREHEAT switch (para 7-22).Verify problem is solved.L. 1. Place multimeter red probe in wire 487 con-nector and black probe on pin A.2. Check for continuity.Repair wire 487 or replace harness12330248 (para 7-71). Verify problem issolved.M. 1. Place multimeter red probe in socket A ofharness 12330248 and black probe in socketD.2. Check for continuity.3. Place multimeter red probe in socket B ofharness 12330248 and black probe in socketc.4. Check for continuity.Repair wire 487 or wire 65B or replace harness12330248 (para 7-71). Verify problem is solved.N.1. Assemble and install APU control box (para7-22).. .2. Place multimter red probe in wire harness12330248 connector 487 and black probe onpin D.3. Check for continuity.Continued on next page2-308
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