BE/Body Electrical Systems — 1 Radio No Power Coming in, page 88

BE–88
BODY ELECTRICAL SYSTEM – AUDIO SYSTEM

1 Radio NO POWER COMING IN

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

Is tape player operating normally?
Yes → Radio assembly faulty.
No
↓
Check if RAD No. 2 fuse is OK?
NG → Replace fuse.
OK
↓
WO                    W
                      Is ACC applied to power amplifier?
                      No → ACC wire harness faulty.
                      Yes
                      ↓
                      Check if GND (wire harness side) to power amplifier is OK?
                      NG → GND faulty.
                      OK
↓
Is ACC applied to radio assembly?
No → WO  ACC wire harness faulty.
         W   Power amplifier faulty.
Yes
↓
Check if GND (wire harness side) to radio is OK?
NG → WO  GND faulty.
          W   Power amplifier faulty.
OK
↓
Radio assembly faulty.