A3 Light module

Plug connector overview

NumberX-pin, colourDescription
X1215-pin, blackPlug connector Light module
X3815-pin, whitePlug connector Light module
X1011754-pin, blackPlug connector Light module

Pin assignments at plug connector X12

PinTypeDescription / Signal typeConnection /
Measuring notes
1 Not used 
   
2ALeft tail lightTail light I left
   
3ARight front turn signal indicatorFront right auxiliary flasher unit
   
4ARight front turn signal indicatorRight front turn signal indicator
   
5ALeft licence plate lightLeft licence plate light
   
6ARight parking lightRight parking light
   
7MControl unit groundGround point
   
8ARear left turn signal indicatorTail light I left
   
9ALeft brake lightTail light I left
   
10ACentre brake lightRaised brake light
   
11ALeft low beam lightLow beam light, left
   
12ARight licence plate lightRight licence plate light
   
13ARight high beam lightRight high beam
   
14 Not used 
   
15EVoltage supply terminal 30Fuse F105
   

Pin assignments at plug connector X38

PinTypeDescription / Signal typeConnection /
Measuring notes
1ASignal line, night lightsConnector terminal 58
   
2MControl unit groundGround connector
   
3ARight low beam lightLow beam light, right
   
4 Not used 
   
5ADriver's door warning lightDriver's door warning light
   
6ALeft high beam lightLeft high beam
   
7ALeft front turn signal indicatorLeft front turn signal indicator
   
8EVoltage supply terminal 30Fuse F101
   
9 Not used 
   
10ARight reversing lightReversing lights
   
11ALeft parking lightLeft parking light
   
12ARear left turn signal indicatorTail light I right
   
13APassenger's door warning lightPassenger's door warning light
   
14ARight brake lightTail light I right
   
15ALeft rear fog lightRear fog light
   

Pin assignments at plug connector X10117

PinTypeDescription / Signal typeConnection /
Measuring notes
1ALighting, light switchLight switch
   
2 Not used 
   
3 Not used 
   
4 Not used 
   
5 Not used 
   
6 Not used 
   
7ESignal, hazard warning lights ONHazard warning flasher switch
   
8 Not used 
   
9ADiagnostic signal Brake lightTail light I right
   
10 Not used 
   
11ADiagnostic signal Turn signal indicatorRight front turn signal indicator
   
12ADiagnostic signal Turn signal indicatorTail light I left
   
13EVoltage supply terminal RFuse F30
   
14 Not used 
   
15EOil level - thermalDME control unit
   
16ESignal, night light dimmerDimmer
   
17ARight tail lightTail light I right
   
18ALeft front turn signal indicatorFront left auxiliary flasher unit
   
19ALights, hazard warning switchHazard warning flasher switch
   
20 Not used 
   
21 Not used 
   
22 Not used 
   
23 Not used 
   
24ADiagnostic signal Turn signal indicatorTail light I right
   
25EBrake light signalBrake light switch
   
26 Not used 
   
27ASupply for beam throw control unit (LWR)Beam throw adjustment control unit (LWR)
   
28 Not used 
   
29ASupply DimmerDimmer
   
30ASignal, left/right turn signal indicatorTurn indicator/low beam selector
   
31ETerminal 15Fuse F24
   
32 Not used 
   
33ESignal, low beam headlight ONLight switch
   
34 Not used 
   
35 Not used 
   
36E/AK-bus signal lineK-bus connector
   
37 Not used 
   
38 Not used 
   
39EReversing signalElectrochromic interior rear-view mirror with integrated interior lights
   
40 Not used 
   
41EBrake fluid levelBrake fluid level switch
   
42 Not used 
   
43 Not used 
   
44 Not used 
   
45ESignal, rear fog lights ONFog light switch
   
46 Not used 
   
47 Not used 
   
48ADiagnostic signal Turn signal indicatorLeft front turn signal indicator
   
49ADiagnostic signal Brake lightTail light I left
   
50ESignal, high beam/headlight flasherTurn indicator/low beam selector
   
51ESignal, side lights ONLight switch
   
52 Not used 
   
53 Not used 
   
54 Not used