Removal & Installation
Lincoln Town Car 1988-1994
The premium sound system is standard on Lincoln Town Car. It consists of Electronic Premium Cassette radio, four speakers (two premium front door speakers and two premium rear speakers). Separate signal return wiring to each speaker is used. The amplifier is in operation and is part of the circuit at all times.
The JBL ® sound system consists of the Electronic Premium Cassette radio, four JBL ® two-way speakers mounted in the doors and rear package tray, one sub-woofer assembly with built-in amplifier mounted under the rear package tray, and an amplifier mounted in the luggage compartment.
A compact disc radio (CDR) is available with the JBL ® sound system.
Disconnect the negative battery cable.
Remove the radio trim panel (1988-90).
Remove the four trim screws securing the radio to the instrument panel. (as necessary).
Install the radio removing tools (1990-95)
Fig. Radio/tape player/CD player installation
Apply a slight spreading force on the tools and pull the radio from the dash.
Disconnect the power, antenna and speaker leads and remove the radio.
Connect the power lead, antenna, and speaker leads.
Slide the radio into the dash ensuring that the rear bracket is engaged on the lower support rail.
Push the radio inward until the retaining clips are fully engaged (1990-95).
Secure the radio by installing the trim screws to the instrument panel (1988-90).
Install the radio trim panel (1988-90).
Lincoln Town Car 1995-2000
The luxury sound system is standard on Town Car. This audio system uses a two-chassis design (distributed radio system).
The luxury analog cassette radio chassis consists of a housing, a cassette player, a bezel assembly, a large graphic vacuum fluorescent display and electronic control switches and circuitry. The front chassis has selective lighting.
The remote chassis unit is mounted below the rear package tray and consists of AM and FM tuners, signal processing hardware, and a four-channel power amplifier.
The front control unit and the remote chassis unit communicate via a Society of Automotive Engineers (SAE) J1708-based audio control protocol. Audio control protocol will also be used to control the digital audio compact disc player and handle commands from the mobile phone.
Audio signal inputs to the remote chassis unit are analog. The analog signal from the cassette is two channels (left and right) of differential signal with twisted and shielded wiring. Inputs for cellular telephone and CD player functions use twisted and shielded wiring.
Outputs from the rear chassis unit are bridge outputs. The power amplifiers are distortion-limited to prevent severe clipping. The four-channel amplifier is fed with full-range signals.
The remote chassis unit will process analog signals from the tuner, tape audio, CD player audio and mobile phone audio.
The front control unit contains the input bezel assembly, the output display and the cassette player. The bezel is backlit with a single electroluminescent lamp for selective back-lighting.
A five-digit vacuum fluorescent display will be used. The display will indicate the station frequency, band (AM and FM), volume setting, cassette player, CD changer and cellular telephone information.
The ACP and cassette player signals use shielded wire. Pins are reserved in the front control unit to terminate the drain wire of the shields.
The front control unit holds a switching power supply which generates sufficient voltage to illuminate the EL panel.
The microcontroller in the front control unit monitors the switch settings, handles commands to ht display and performs ACP network tasks.
The remote chassis unit consists of three major sections.
The AM/FM tuner processes the radio frequency signal and produces the left and right analog audio signals.
The microprocessor control and audio processor board controls the remote chassis unit and processes all of the audio input signals from the front control unit, tuner and cellular phone.
The 4 channel 20-Watt audio power amplifier and RCU power supply board.
All sections are contained in a single aluminum heat sink casting.
Antennas are concealed on all vehicles.
Front Control Unit
The diversity antenna system uses two concealed antennas
The AM antenna consists of the rear window defroster grid on the interior of the rear window.
The FM antenna consists of conductive tracing on the rear window above the rear window defroster grid.
Active and wide-band antenna elements are used.
A multipath circuit and the microprocessor monitor FM signal level.
The antenna-switching scheme is controlled by the microprocessor.
Disconnect the negative battery cable.
Install the radio removing tool into the radio face plate far enough to engage the retaining clips.
Apply a slight spreading force on the tools and pull the radio chassis out of the instrument panel.
Disconnect the wiring connectors and remove the radio chassis.
Connect the wiring connectors to the radio chassis.
Slide the radio chassis into the instrument panel. Making sure it is squarely inserted.
Push the radio chassis inward until the retaining clips are fully engaged.
Connect the negative battery cable.