A3 Light module

Connector overview

NumberX-number of pinsDescription
X1215Light module Connector A
X3815Light module Connector B
X1011754Light module Connector C

Pin assignments at connector A X12

PinTypeDescription / Signal typeConnection /
Measuring notes
1ARight rear fog lightRight rear light assembly I
   
2ALeft tail lightLeft rear light assembly I
   
3ARH front park lightRight headlight
   
4ARight fog lightRight fog light
   
5ALeft license plate lightLeft license plate light
   
6ARight front turn lightRight front turn light
   
7MControl module groundGround point
   
8ARear left turn lightLeft rear light assembly I
   
9ALeft brake lightLeft rear light assembly I
   
10ACenter brake lightHigh level stop light
   
11ALeft low beam lightLeft headlight
   
12ARight license plate lightRight license plate light
   
13ARight high beam lightRight headlight
   
14ARight front turn lightRight front auxiliary turn light
   
15ETerminal 30Fuse F6
   

Pin assignments at connector B X38

PinTypeDescription / Signal typeConnection /
Measuring notes
1ANighttime illumination signalTerminal 58g splice
   
2MControl module groundGround splice
   
3ARight low beam lightRight headlight
   
4ALeft front turn lightLeft front auxiliary turn light
   
5ALeft tail lightLeft rear light assembly I
   
6ALeft high beam lightLeft headlight
   
7ALeft fog lightLeft fog light
   
8ETerminal 30Fuse F2
   
9ALeft back-up lightLeft rear light assembly I
   
10ARight back-up lightRight rear light assembly I
   
11ALeft front turn lightLeft front turn light
   
12ALH rear turn lightRight rear light assembly I
   
13ARight tail lightRight rear light assembly I
   
14ARight brake lightRight rear light assembly I
   
15ALeft rear fog lightLeft rear light assembly I
   

Pin assignments at connector C X10117

PinTypeDescription / Signal typeConnection /
Measuring notes
1AIllumination switchLight switch
   
2ALH adjustment controlLeft headlight
   
3AEngine ground LH adjustmentLeft headlight
   
4ALH adjustment controlLeft headlight
   
5AEngine ground LH adjustmentLeft headlight
   
6ESeat belt signalDriver's seat belt switch
   
7EHazard lights ON signalHazard switch
   
8ERear fog light ON signalFog light switch
   
9 Not used 
   
10EWasher fluid levelWasher fluid level switch
   
11 Not used 
   
12AWarning lamp preheating/error signalDDE control module DDE
   
13ETerminal RFuse F41
   
14ERight turn light signalCombination switch
   
15EOil level - thermalOil level sensor
   
16EDimmer signalDimmer
   
17ARight tail lightRight rear light assembly I
   
18ALH front park lightLeft headlight Left front turn light US
   
19AHazard switch illuminationHazard switch
   
20ARH adjustment controlLeft headlight
   
21AEngine ground RH adjustmentLeft headlight
   
22ARH adjustment controlLeft headlight
   
23AEngine ground RH adjustmentLeft headlight
   
24ECoolant levelEngine coolant level switch
   
25EBrake light signalBrake light switch
   
26AAcoustic signalChime module, Japan
   
27AHeadlight widening control module powerHeadlight widening control module
   
28 Not used 
   
29 Not used 
   
30 Not used 
   
31ETerminal 15Fuse F16
   
32ELeft turn light signalCombination switch
   
33EHeadlights ON signalLight switch
   
34ESignal Headlight widening adjustmentHeadlight widening potentiometer
   
35ETrailer adapter module (AHM) signal lineRight rear light assembly I
   
36EI-bus signal lineI-bus splice
   
37 Not used 
   
38ENot used 
   
39ARear-view mirror controlElectrochromic rear view mirror
   
40 Not used 
   
41EBrake fluid levelBrake fluid level switch
   
42EIgnition key malfunction indicator (US only)Ignition switch
   
43EHeadlight flash signalCombination switch
   
44EHigh beam ON signalCombination switch
   
45ERear fog light ON signalFog light switch
   
46 Not used 
   
47 Not used 
   
48 Not used 
   
49ECatalytic converter overheatedThermal control relay (Japan)
   
50 Not used 
   
51EPark light ON signalLight switch
   
52 Not used 
   
53ESignal Headlight widening adjustmentHeadlight widening potentiometer
   
54ATerminal 58 illuminationElectronic shock absorber control module (EDC)