A3 Light module

Connector overview

NumberX-pin, colorDescription
X1215-pin, blackConnector Light module
X3815-pin, whiteConnector Light module
X1011754-pin, blackConnector Light module

Pin assignments at connector X12

PinTypeDescription / Signal typeConnection /
Measuring notes
1ARight rear fog lightRight rear light assembly I
   
2ALeft tail lightLeft rear light assembly I
   
3ARight front turn lightRight front turn signal lamp Right front auxiliary turn light USA
   
4ARight fog lightRight fog light
   
5ALeft license plate lightLeft license plate light
   
6ARight front turn lightRight front turn signal lamp
   
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 lightLow beam light, left
   
12ARight license plate lightRight license plate light
   
13ARight high beam lightRight high beam
   
14ARight front turn light Tyre pressure controlRight front auxiliary turn light
   
15ETerminal 30 voltage supplyFuse F112
   

Pin assignments at connector X38

PinTypeDescription / Signal typeConnection /
Measuring notes
1ANighttime illumination signal lineTerminal 58 splice
   
2MControl module groundGround splice
   
3ARight low beam lightLow beam light, right
   
4ALeft front turn light Tyre pressure controlLeft front auxiliary turn light
   
5ALeft tail lightLeft rear light assembly I
   
6ALeft high beam lightLeft high beam
   
7ALeft fog lightLeft fog light
   
8ETerminal 30 voltage supplyFuse F113
   
9ALeft back-up lightLeft rear light assembly I
   
10ARight back-up lightRight rear light assembly I
   
11ALeft front turn lightLeft front turn signal lamp
   
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 X10117

PinTypeDescription / Signal typeConnection /
Measuring notes
1AIllumination switchLight switch
   
2ASignal, headlight vertical aim controlActuator for headlight beam throw control, left
   
3ASignal, headlight vertical aim controlActuator for headlight beam throw control, left
   
4ASignal, headlight vertical aim controlActuator for headlight beam throw control, left
   
5ASignal, headlight vertical aim controlActuator for headlight beam throw control, left
   
6ESeat belt signalDriver's air bag
   
7EHazard lights ON signalHazard warning flasher switch
   
8ERear fog light ON signalFog light switch
   
9 Not used 
   
10EWasher fluid levelWasher fluid level switch
   
11 Not used 
   
12 Not used 
   
13EVoltage supply terminal RFuse F41
   
14ERight turn light signalCombination switch
   
15EOil level - thermalEngine control module (DME) DDE control module Digital diesel electronics control unit
   
16EDimmer signalDimmer
   
17ARight tail lightRight rear light assembly I
   
18ALH front park lightLeft front turn signal lamp
   
19AHazard switch illuminationHazard warning flasher switch
   
20ASignal, headlight vertical aim controlActuator for headlight beam throw control, right
   
21ASignal, headlight vertical aim controlActuator for headlight beam throw control, right
   
22ASignal, headlight vertical aim controlActuator for headlight beam throw control, right
   
23ASignal, headlight vertical aim controlActuator for headlight beam throw control, right
   
24EEngine coolant levelEngine coolant level switch
   
25EBrake light signalBrake light switch
   
26ABack up signalChime module, Japan
   
27AHeadlight widening control module powerHeadlight widening control module
   
28ABack up signalIntermittent wipe/wash control unit, rear
   
29 Not used 
   
30 Not used 
   
31ETerminal 15Fuse F16
   
32ELeft turn light signalCombination switch
   
33EHeadlights ON signalLight switch
   
34ESignal Headlight widening adjustmentHeadlight widening potentiometer
   
35AInterface AHM/LMTrailer module (AHM)
   
36E/AI/K-bus signal linkConnector, I/K-bus
   
37 Not used 
   
38EBack up signalNavigation control module
   
39EBack up signalElectrochromic rear view mirror
   
40 Not used 
   
41EBrake fluid levelBrake fluid level switch
   
42 Not used 
   
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 
   
49 Not used 
   
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)