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Radio Balance Check radio function
Speaker Disconnected Check speaker connection at
radio and/or speaker
Only one channel (right or left
side)
Speaker lead shorted or
grounded
Check speaker wiring continuity
to ground w/tester or meter
Popping in one or both channels Speaker wiring shorted or
positive lead grounded
Speaker terminals grounded or
shorted
Leads from speaker cone to
terminal touching metal basket
or speaker
Antenna disconnected Connect antenna
Antenna mast grounded or
shorted
Check antenna or substitute with
antenna known to be good
Antenna center lead broken Check antenna or substitute with
antenna known to be good
No AM Reception
Note: Antenna leads can be tested with continuity or multi-tester.
Some may have electronic component (capacitor) built-in which will
not allow it to be tested.