Workshop Manuals Factory service & repair Alfa Romeo
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Alfa Romeo 145/146 Electrical System Diagnosis Manual, Volume 3 (1994-2001)02 · 146 electrical system diagnosis
02 · Diagnostics

General description

Make
Alfa Romeo
Model
145/146 Electrical System Diagnosis Manual, Volume 3
Year
1994–2001
Section
Car Radio › General description
146 electrical system diagnosisGeneral description

GENERAL DESCRIPTION

The car is pre-wired for the installation of a car radio system complete with six speakers.

Upon request a fixed radio is supplied with two front speakers 165 mm in diameter with 2 separate tweeters, and two rear two-way speakers 130 mm in diameter.

The front speakers are located at the sides in the lower part of the front doors, with the tweeters on the pillar, while the rear speakers are the centre of the rear doors

The aerial is a "stylus" type fitted on the roof panel and it is connected to the radio by a coaxial cable.

The radio is supplied directly from the battery; this makes it possible to memorise tuning, safety codes, etc. in the radio set.

An anti-disturbance condenser has also been fitted inside the stop lights switch H3 to ensure "electronic silencing" towards the electric services that might interfere on the radio circuit.

The fixed radio is installed during production: it is a PHILIPS DC 710/255 radio with RDS decoder and cassette player; the radio has a removable front panel to protect against theft and an internal security code for further protection. All the details about the features of the radio and how it works are described in the Instructions Handbook supplied with it.

FUNCTIONAL DESCRIPTION

The radio O4 is supplied directly by battery current via fuse F2 (F16 for box "C") of fusebox G1: the supply for memory storage, etc. reaches pin 4 of connector B, while the power supply for operating the radio reaches pin 7 of the same connector.

Pin 8 of connector B is earthed.

The "side lights on" signal reaches pin 6.

The cables carrying the signals lead from connector A of O4 to the six speakers.

The aerial is connected to the radio via the special screened coaxial cable G65.

Parts & tools for this job For 1994 Alfa Romeo 145/146

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