BE/Body Electrical Systems — Either Am or Fm Does Not Work, Reception Poor (Volume Faint), Few Preset Tuning Bands, page 93

BE–93
BODY ELECTRICAL SYSTEM – AUDIO SYSTEM

6  Radio  EITHER AM OR FM DOES NOT WORK, RECEPTION POOR (VOLUME FAINT), FEW PRESET TUNING BANDS

W  : w/ Power Amplifier
WO : w/o Power Amplifier

Problem with radio wave signals or location? (See SYSTEM DESCRIPTION)
Yes → Poor signals, poor location.
No

Are both AM and FM defective?
No → Radio assembly faulty.
Yes

Is power for the antenna being output from the radio assembly.
No

WO                    W
              Is power for the antenna being output from the power amplifier?
              No → Power amplifier faulty. .
              Yes

Go to No. 32.
No

Is tape player operating normally? '
Yes → Radio assembly faulty?
No

Temporarily install another speaker. . Functions OK?
Yes → Speaker faulty.
No

W                    WO
             Radio assembly faulty.

Hissing sound from speaker?
No → Power amplifier faulty. Recheck system after repair. ,
Yes

Radio assembly faulty. Recheck system after repair.