Communication system malfunctioning.
One radio fails to operate. Do steps 1 thru 3.
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts a metal surface a direct
short may result in instant heating of tools, damage to equipment, and injury or death to personnel.
Disconnect switch panel, radio, and bilge pump to bulkhead wiring harness from both communications
systems. Place red lead of multimeter in one socket A of wire 48 and black lead to ground. Turn
MASTER switch on and check for voltage. Then place red lead of multimeter in other socket A of wire
48 and black lead to ground and check for voltage. Turn MASTER switch OFF. If voltage is present in
both sockets, go to step 2. If voltage is present in one or not present in either, go to step 3.