Radio, Stereo, and Compact Disc: Description and Operation

The Radio receives battery voltage at all times on CKT 1733 from the Multi-function Alarm Module to keep clock and preset station memory alive when the Ignition Switch is "OFF". With the ignition switch in "ACCY" or "RUN", voltage is applied to CKT 43 from the RDO IGN fuse to enable radio operation.
When the park lights or headlights are turned on, voltage is applied to the radio on CKT 9 from the headlight switch. When voltage is applied to CKT 9 at the radio, the radio will dim the display preset amount. With the headlights or park lights on, the radio display may be dimmed manually using the I/P dimmer switch. The I/P dimmer switch varies the voltage on CKT 8 to the radio to control display dimming.
If the radio uses the Defogger grid as an antenna, the radio signals are amplified and processed in the antenna/rear defogger module before being sent to the radio via the coax cable.