Workshop Manuals Factory service & repair Alfa Romeo
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Alfa Romeo 145/146 Electrical System Diagnosis Manual, Volume 3 (1994-2001)01 · 145 electrical system diagnosis
01 · Diagnostics

General description

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

GENERAL DESCRIPTION

Certain versions, of the car, specific for some Markets, are fitted with the "DIM-DIP" device.

In compliance with the laws of certain countries, this device enables two different levels of luminosity of the low beam headlamps: the first level (dimmed light) is turned on together with the sidelights, the second level (maximum luminosity) are the true and proper low beam lamps.

The device comprises a relay which supplies the lamps through a resistance when the sidelights are on, consequently reducing the intensity of the bulbs.

The normal circuit for the low beams by-passes this device and operates normally, as in the other versions (see the section "Low beam and high beam headlamps").

A special fuse protects the supply line for the "DIM-DIP" device.

FUNCTIONAL DESCRIPTION

The circuit of the "DIM-DIP" device is regulated by the special "DIM-DIP" relay I91, located in the fusebox G1.

The relay is supplied by battery voltage through fuse F24 which protects the whole line.

Moving the switch of the lever unit B68 to position I >D< - sidelights - the coil of relay I91 is supplied which is thus energized: this way, in addition to the sidelights also the line for the low beam headlamps E24 (left) and E24 (right) is supplied through the additional "DIM-DIP" resistance O28 : this way the brightness of the lamps is dimmed.

Moving the switch of the lever unit B68 to position II - low beams - the coil of relay I49 of fusebox G1 is supplied, sending the supply directly to the headlamps E24 and E23, by-passing resistance O28, thereby obtaining the complete brightness of the headlamps (see the section "High beam and low beam headlamps").

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

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