CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONSTM 9-2350-256-202-19 ELECTRICAL TROUBLESHOOTING-ContinuedPOWERPLANT WARNING HORN-ContinuedWARNINGRemove all jewelry such as rings, dog tags,bracelets, etc. If jewelry contacts a metalsurface a direct short may result in instantheating of tools, damage to equipment, andinjury or death to personnelG Place red lead of multimeter on pin A and blacklead on pin C of horn relay. Check for continuity. Ifcontinuity is present, go to step H. If continuity isnot present, go to step K.H Place a jumper wire from pin C to socket C. Placered lead of multimeter on pin B of warning hornrelay and black lead to ground. Turn MASTERswitch on, start engine, set to idle, and check forvoltage. Turn engine and MASTER switch OFF. Ifvoltage is present, go to step I. If voltage is notpresent, replace warning horn relay (see paragraph6-21).I Reconnect gage panel to bulkhead wiring harness towarning horn relay. Disconnect wire 26A fromwarning horn. Place red lead of multimeter in wire26A and black lead to ground. Turn MASTER switchon, start engine, set to idle, and check for voltage.Turn engine and MASTER switch OFF. If voltage ispresent, go to step J. If voltage is not present,replace/ repair wire 26A of gage panel to bulkheadwiring harness (see paragraph 6-45 for dualvoltage; 6-46 for single voltage).2-216
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