SECTION V: TROUBLESHOOTINGTM 9-2350-256-20WARNINGRemove 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 personnel.A Disconnect switch panel, radio, and bilge pump tobulkhead wiring harness from both communicationssystems. Place red lead of multimeter in one socketA of wire 48 and black lead to ground. TurnMASTER switch on and check for voltage. Thenplace red lead of multimeter in other socket A ofwire 48 and black lead to ground and check forvoltage. Turn MASTER switch OFF. If voltage ispresent in both sockets, go to step B. If voltage ispresent in one or not present in either, go to step C.B Disconnect one ground wire from bulkhead. Placered lead of multimeter in socket B of ground wireand black lead on other end of ground wire. Checkfor continuity. Disconnect other ground wire frombulkhead. Place red lead of multimeter in socket Bof ground wire and black lead on other end of groundwire. If continuity is present, troubleshoot masterrelay (see paragraph 2-19, master relay fails tooperate). If continuity is not present,repair/replace ground wire of switch panel, radio,and bilge pump to bulkhead wiring harness (seeparagraph 6-53).C Reconnect ground wires to hull and switch panel,radio, and bilge pump to bulkhead wiring harnessto both communications systems. Disconnect wire 48pin A from bulkhead to master relay wiringharness. Place red multimeter lead in socket andblack lead to ground. Turn MASTER switch on andcheck for voltage. Turn MASTER switch OFF. Ifvoltage is present, repair or replace switch panel,radio, and bilge pump to bulkhead wiring harness(see paragraph 6-53). If voltage is not present,troubleshoot master relay circuit (see paragraph2-19, master relay fails to operate).2-239
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
