TM  10-3930-638-24&P 2-34.   WIRING   HARNESS   MAINTENANCE   (cont) a.  Front  Wiring  Harness  (cont). STEP LOCATION ITEM ACTION REMARKS TESTING NOTE Testing of the front wiring harness consists of starting the engine, turning on all lights, depressing the service brake pedal, and observing that all lights/ indicators/ gages are operating. If any abnormal  indications  are  observed,  refer  to  the  troubleshooting procedures in this section. To perform a continuity test of the front wiring harness using an ohmmeter, refer to the electrical system  wiring  schematic  located  in  appendix  F. 2-190