Radio/Stereo: Description and Operation

System Description
Power is supplied at all times
- through 15 A fuse [No.4, located in the fuse block (J/B)]
- to audio unit terminal 6,
- to audio amp. relay terminal 3 and
- to rear speaker amp. terminal 11.

With the ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No.10, located in the fuse block (J/B)]
- to audio unit terminal 10.

Ground is supplied through the case of the audio unit.

Ground is supplied
- to audio amp. relay terminal 2
- through body grounds M4, M66 and M147
- to front door speaker LH terminal 5 and
- to front door speaker RH terminal 5
- through body grounds M77 and M111
- to rear speaker amp. terminal 24
- through body grounds B11, B22 and D210.

When the audio unit POWER button is pressed, power is supplied
- to rear speaker amp. terminal 9 and
- to audio amp. relay terminal 1
- from audio unit terminal 12.

Then audio amp. relay is energized and power is supplied
- to front door speaker LH terminal 4 and
- to front door speaker RH terminal 4.

Audio signals are supplied
- through audio unit terminals 1, 2, 3, 4, 13, 14, 15 and 16
- to terminals 2 and 6 of the LH and RH front speakers and terminals 5, 7, 18 and 20 of the rear speaker amp.
- to LH and RH tweeters through terminals 1 and 3 of the front speaker.
- to rear LH and RH speakers through terminals 1, 2, 25 and 26 of the rear speaker amp.