Radio Circuit Description
Voltage to the radio is available at all times through CKT 1140
(ORN). CKT 1140 provides voltage for radio station memory storage
and for the clock memory. With the ignition switch in ACC or RUN,
voltage is supplied to the radio through the RADIO ACCY
(Fuse 2) and CKT 43 (YEL). Each speaker has its own
pair of leads. The radio/clock display brightness is at full intensity
with the ignition switch in ACC or RUN. The voltage is supplied by
CKT 43 (YEL). When the parklamps or headlamps are turned ON,
the radio senses the signal and switches voltage for the display
from CKT 43 (YEL) to CKT 8 (GRY). The VFD is controlled through
the Body Control Module (BCM). Full VFD is achieved by turning the
first detent on the headlamp and the parklamp dimmer switch ON or
when the Ambient Light Sensor indicates a dark condition. Voltage is supplied
to the radio through CKT 1382 (PPL/WHT). The display brightness
is then controlled by the Headlamp and Panel Dimmer switch. The radio
illumination bulb voltage is supplied by CKT 8 (GRY).
Sub-Woofer Amplifier Circuit Description (Optional)
| • | The optional amplifier boosts the sound of the 2 rear speakers
when equipped with the premium sound system. |
| • | With the ignition switch in the ACC or RUN position and the radio
control head ON, battery voltage is supplied from the AUX PWR (Fuse 7). Voltage
then goes to the sub-woofer amplifier through CKT 840 (ORN). |
| • | Ground is completed through CKT 1350 (BLK) at the left
rear lamps ground G400. |
Remote Compact Disc Player Circuit Description (Optional)
| • | With the ignition switch in the RUN position and the radio control
head ON, voltage is supplied to the CD player through the radio. |
| • | With a CD in the remote CD player, the CD player returns a CD
ON signal. |
| • | With the remote CD player in PLAY, the stereo audio signals to
the radio. |
| • | The CD ON signal causes the receiver circuitry to ignore the signals
from the tuner. |
| • | The CD ON signal sends the studio signals from the tape player
to the speakers. |
| • | When the EJECT button is pushed on the CD player, the TAPE ON
signal disappears. |
| | The radio returns to normal operation. |
