TM  10-3930-638-24&P 3-11.   WIRING   HARNESS   TROUBLESHOOTING   (cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE ACTION 2. ONE ELECTRICAL CIRCUIT INOPERATIVE (cont) Step 2. Use an ohmmeter to check for short circuit caused by damaged insulation, screw driven through the wire, or wires from different circuits making contact. a. If harness wire is shorted or grounded, and not accessible for repair, replace wiring harness (para  3-15). b. If harness wire is not shorted, test electrical component in affected circuit (refer to organizational maintenance). 3-93