For DELCO-LOC 2 Anti-Theft feature or for radio features and controls operations refer to Vehicle Theft Deterrent (VTD)Circuit Description
For THEFTLOCK Anti-Theft feature or for radio features and control operations refer to Vehicle Theft Deterrent (VTD)Circuit Description
The radio receives battery voltage at all times on circuit 640 from the PWR ACCY Fuse 7 to keep clock and preset station memory enabled when the ignition is off. With the ignition switch in ACCY, RUN or Retained Accessory Power (RAP), voltage is applied to circuit 43 from the RADIO Fuse 17 to enable radio operation.
When the park lights or headlights are turned on, voltage is applied to the radio on circuit 9 from the headlamp switch. When voltage is applied to circuit 9 at the radio, the radio will illuminate the display. With the headlights or park lights on, the radio display may be dimmed manually using the IP dimmer switch. The IP dimmer switch varies the voltage on circuit 8 to the radio to control display dimming.
Speakers: Chevrolet UQ0, U62 or UW6 and Pontiac W52, W53, W54, W55, W56, W57 Entertainment Systems
With the base speaker system, the audio signals are amplified within the radio, and the output signals go directly to the speakers.
Speakers: Pontiac W59 and W73 Entertainment Systems (6 Speaker-Convertible Only)
Similar to the base speaker system, the audio signals are amplified within the radio, and the output signals go directly to the 6 speakers.
Speakers: Chevrolet UZ7 (6 Speaker Sound System)
All radio audio output signals are connected directly to the amplifier. All of the 6 speakers in the system are connected to the amplifier outputs, and are driven by the amplified radio audio signals. The amplifier is used to drive two front speaker assemblies consisting of one tweeter and one midrange speaker, two rear extended range speakers, and two rear subwoofers.
Speakers: Pontiac W54 and W55 Entertainment Systems (10 Speaker Sound System)
Radio audio output signals for two front and two rear tweeters are amplified within the radio and the output signals go directly to the speakers.
All radio audio output signals are also connected to the amplifier. The other six speakers in the system are connected to the amplifier outputs, and are driven by the amplified radio audio signals. The amplifier is used to drive front midrange, two rear midrange, and two rear subwoofers with dual voice coils.
