Radio: No Power Coming In - Toyota Hilux Surf 1993 Owner's Manual

Radio
[R] Radio [S]: Radio + Tape Player [U]: Radio–Tape Player (Built–in Power Amplifier)
[P] Radio–Tape Player (Separate Power Amplifier)
[S][U][P]
Is tape player operating normally?
[R][S][U]
[R][S][U][P]
Is ACC applied to radio assembly?
Yes
Check if G ND (wire harness side) to radio is
OK.
Radio faulty.
Radio assembly faulty.
BODY ELECTRICAL SYSTEM
NO POWER COMING IN
Is ACC applied to power
amplifier?
Yes
Is ACC for the radio assembly
being output from the power am–
plifier?
Yes
Check if GND (wire harness side) to power amplifier is
OK.
– Audio System
Yes
Radio faulty.
Radio assembly faulty.
Replace fuse.
ACC wire hareness faulty.
Power amplifier faulty.
ACC wire harness faulty.
Power Amplifier faulty.
G ND wire harness faulty.
BE–93
GND faulty.