Workshop Manuals Factory service & repair

Alfa Romeo 156 Factory Service Manual (1997-2002)14 · Connectors and pin-outs

14 · General

B1 Junction unit

Make: Alfa Romeo
Model: 156 Factory Service Manual
Year: 1997–2002
Section: Valves and fuse holders › B1 Junction unit

‹ Prev A40 Heater plug Next › B5 MAXI FUSE-1 box

Connectors and pin-outsB1 Junction unit

B1 Junction unit

Connector B1A – front harness (white) – up to 2/99

Connector B1A, Junction unit

Pin	mm²	Colour		To
–	8.0	BR	white/red	B5A
–	6.0	G	yellow	B5A B12 pin @

Connector B1A – front harness (white) – from 2/99

Connector B1A, Junction unit

Pin	mm²	Colour		To
–	8.0	BR	white/red	B99A B99B B12 pin @ B98A pin 1

Connector B1B – dashboard harness – S.W.

Connector B1B, Junction unit

Pin	mm²	Colour		To
1	6	R	red	B1J pin 5 B1F pin 5 J60 pin 30 J45 pin 87

Connector B1B – dashboard harness (white)

Connector B1B, Junction unit

Pin	mm²	Colour		To
1	6.0	R	red	B1B pin - B1J pin 5 B1F pin 5 J60 pin 30 J45 pin 87

Connector B1E – rear harness – S.W.

Connector B1E, Junction unit

Pin	mm²	Colour		To
4	2.5	MN	brown/black	D87 pin 4 D30 pin 6 D31 pin 27
5	2.5	MB	brown/white	N40 pin 4
7	1.0	A	light blue	F31 pin 2
11	1.5	RG	red/yellow	M40B pin 7 G31 pin 2 G32 pin 2
14	1.0	RN	red/black	D87 pin 2

Connector B1E – rear harness (white)

Connector B1E, Junction unit

Pin	mm²	Colour		To
4	2.5	MN	brown/black	P22B pin - D30 pin 6 D31 pin 27
5	2.5	MB	brown/white	N40 pin 4
7	1.0	A	light blue	F31 pin 2
11	1.5	RG	red/yellow	M35 pin 7 D76 pin 1 M40B pin 7 D75 pin 6 G32 pin 2
14	1.0	R	red	F40 pin 2

Connector B1G – rear harness – S.W.

Connector B1G, Junction unit

Pin	mm²	Colour		To
4	1.5	C	orange	M40B pin 8 P92 pin 3
5	1	AN	light blue/black	F30 pin 2
6	1	BN	white/black	D87 pin 3
7	1	B	white	D88 pin 4
10	0.5	R	red	G25 pin 2
11	0.5	RN	red/black	G26 pin 2
12	1	RN	red/black	G10 pin 2

Connector B1G – rear harness (white)

Connector B1G, Junction unit

Pin	mm²	Colour		To
4	1.5	C	orange	M40B pin 8
5	1.0	AN	light blue/black	F30 pin 2
6	1.0	BN	white/black	D40 pin 2
7	1.0	B	white	D40 pin 1
9		R	red	M35 pin 3
10	1.5	RN	red/black	G10 pin 2 D75 pin 6
11		RN	red/black	G26 pin 2
12		RN	red/black	G25 pin 2

Connector B1G – rear harness (white) – Electric sunroof

Connector B1G, Junction unit

Pin	mm²	Colour		To
4	1.5	C	orange	M40B pin 8
5	1.0	AN	light blue/black	F30 pin 2
6	1.0	BN	white/black	D40 pin 2
7	1.0	B	white	D40 pin 1
9		R	red	M35 pin 3
10	1.5	RN	red/black	G10 pin 2 D75 pin 6
11		RN	red/black	G20 pin 2

Connector B1J – dashboard harness – S.W.

Connector B1J, Junction unit

Pin	mm²	Colour		To
2	1.5	R	red	P20A pin 4 P20A pin 7
4	0.5	HL	grey/blue	D20 pin 48
5	1.5	BR	white/red	B1F pin 5 B1B pin @ J45 pin 87 J60 pin 30
7	1	RV	red/green	D21A pin 2
8	1	RN	red/black	D1 pin A6
9	1	R	red	E20 pin 2

Connector B1J – dashboard harness (white) – up to 01/00

Connector B1J, Junction unit

Pin	mm²	Colour		To
2	1.5	R	red	P20A pin 4 P20A pin 7
4		HL	grey/blue	D20 pin 48
5	1.5	BR	white/red	B1B pin - B1F pin 5 J60 pin 30 J45 pin 87
7	1.0	RV	red/green	D21A pin 2
8	1.0	RN	red/black	D1 pin 7
9	1.0	R	red	E20 pin 2 E10A pin 9

Connector B1J – dashboard harness (white) – from 01/00

Connector B1J, Junction unit

Pin	mm²	Colour		To
2	1.5	R	red	P20A pin 4 P20A pin 7
4		HL	grey/blue	D20 pin 48
5	1.5	BR	white/red	B1B pin - B1F pin 5 J60 pin 30 J45 pin 87
7	1.0	RV	red/green	D21A pin 2
8	1.0	RN	red/black	D1 pin A6
9	1.0	R	red	E20 pin 2 E10A pin 9

Connector B1F – dashboard harness (black)

Connector B1F, Junction unit

Pin	mm²	Colour		To
2	2.5	H	grey	J45 pin 30
3	2.5	LR	blue/red	H5B pin 1
4	2.5	L	blue	J45 pin 86
5	2.5	R	red	B1B pin - B1J pin 5 J60 pin 30 J45 pin 87

Connector B1H – dashboard harness (white)

Connector B1H, Junction unit

Pin	mm²	Colour		To
1	1.0	AN	light blue/black	H5C pin 1
3	1.0	AN	light blue/black	H20B pin 3
6	1.0	A	light blue	H5C pin 3
7	1.0	A	light blue	H20B pin 1

Connector B1C – front harness (black) – from 01/00

Connector B1C, Junction unit

Pin	mm²	Colour		To
1	2.5	RG	red/yellow	D6A pin A1
2	2.5	MB	brown/white	J15 pin 87
3	1.5	AR	light blue/red	D1 pin C5 D2A pin 10
4	1.5	HN	grey/black	F11B pin 2 N31 pin 3
5	1.5	HR	grey/red	N30 pin 3 F10B pin 2
6	1.0	V	green	F10B pin 4 E15B pin 4
7	1.0	VN	green/black	F11B pin 4

Connector B1C – front harness (black) – from 01/00

Connector B1C, Junction unit

Pin	mm²	Colour		To
1	2.5	RG	red/yellow	D6A pin A1
2	2.5	MB	brown/white	D4A pin 1 J15 pin 87
3	1.5	AR	light blue/red	D1 pin C5 D2A pin 10
4	1.5	HN	grey/black	F11B pin 2 N31 pin 3
5	1.5	HR	grey/red	N30 pin 3 F10B pin 2
6	1.0	V	green	F10B pin 4 E15B pin 4
7	1.0	VN	green/black	F11B pin 4

Connector B1C – front harness (black) – 156 TS-16V <05/98

Connector B1C, Junction unit

Pin	mm²	Colour		To
1	2.5	RG	red/yellow	D6A pin 21
2	2.5	MB	brown/white	J15 pin 87 B36 pin -
3	1.5	AR	light blue/red	D1 pin 1 J20 pin 30
4	1.5	HN	grey/black	D2A pin 10 N31 pin 3
5	1.5	HR	grey/red	N30 pin 3 D2A pin 20
6	1.5	V	green	D2A pin 14 E15B pin 4
7	1.5	VN	green/black	D2A pin 8

Connector B1C – front harness (black) – up to 01/00

Connector B1C, Junction unit

Pin	mm²	Colour		To
1	2.5	RG	red/yellow	D6A pin 21
2	2.5	MB	brown/white	D4A pin 1 J15 pin 87
3	1.5	AR	light blue/red	D1 pin 1 J20 pin 30
4	1.5	HN	grey/black	D2A pin 10 N31 pin 3
5	1.5	HR	grey/red	N30 pin 3 D2A pin 20
6	1.5	V	green	D2A pin 14 E15B pin 4
7	1.5	VN	green/black	D2A pin 8

Connector B1C – front harness (black) – up to 01/00

Connector B1C, Junction unit

Pin	mm²	Colour		To
1	2.5	RG	red/yellow	D6A pin 21
2	2.5	MB	brown/white	J15 pin 87
3	1.5	AR	light blue/red	D1 pin 1 J20 pin 30
4	1.5	HN	grey/black	D2A pin 10 N31 pin 3
5	1.5	HR	grey/red	N30 pin 3 D2A pin 20
6	1.5	V	green	D2A pin 14 E15B pin 4
7	1.5	VN	green/black	D2A pin 8

Connector B1D – front harness (white) – from 01/00

Connector B1D, Junction unit

Pin	mm²	Colour		To
1		G	yellow	N31 pin 2
2	1.0	G	yellow	H10 pin 2
3		G	yellow	N30 pin 2
4	1.0	A	light blue	F11A pin 1 F21 pin 2 E15B pin 16 M30B pin 1
5	1.0	AR	light blue/red	D3 pin F
6	1.0	HR	grey/red	H10 pin 3
7		HR	grey/red	E15A pin 8
9	1.0	B	white	D3 pin D
10	1.5	Z	violet	P10A pin @
11	1.5	Z	violet	P11A pin @
13	1.5	AB	light blue/white	E15A pin 10
14	1.5	S	pink	I30 pin 1 M30B pin 12 J38 pin 30
15	1.0	AN	light blue/black	E15B pin 9 M30B pin 2 F20 pin 2 F10A pin 1
16	1.5	AV	light blue/green	E15A pin 16
18	1.5	RV	red/green	I30 pin 2 D4A pin 7 D5A pin H E15A pin 5

Connector B1D – front harness (white) – from 01/00

Connector B1D, Junction unit

Pin	mm²	Colour		To
1		G	yellow	N31 pin 2
2	1.0	G	yellow	H10 pin 2
3		G	yellow	N30 pin 2
4	1.0	A	light blue	F11A pin 1 F21 pin 2 E15B pin 16 M30B pin 1
5	1.0	AR	light blue/red	I20 pin 1
6	1.0	HR	grey/red	H10 pin 3
7		HR	grey/red	E15A pin 8
9	1.0	B	white	I20 pin 2
10	1.5	Z	violet	P10A pin @
11	1.5	Z	violet	P11A pin @
13	1.5	AB	light blue/white	E15A pin 10
14	1.5	C	orange	I30 pin 1 M30B pin 12
15	1.0	AN	light blue/black	E15B pin 9 M30B pin 2 F20 pin 2 F10A pin 1
16	1.5	AV	light blue/green	E15A pin 16
18	1.5	RV	red/green	I30 pin 2 D4A pin 7 D5A pin H E15A pin 5

Connector B1D – front harness (white) – Euro3

Connector B1D, Junction unit

Pin	mm²	Colour		To
1		G	yellow	N31 pin 2
2	1.0	G	yellow	H10 pin 2
3		G	yellow	N30 pin 2
4	1.0	A	light blue	D2A pin 13 F21 pin 2 E15B pin 16 M30B pin 1
5	1.0	AR	light blue/red	I20 pin 1
6	1.0	HR	grey/red	H10 pin 3
7		HR	grey/red	E15A pin 8
9	1.0	B	white	I20 pin 2
10	1.5	Z	violet	P10A pin @
11	1.5	Z	violet	P11A pin @
13	1.5	AB	light blue/white	E15A pin 10
14	1.5	C	orange	I30 pin 1 M30B pin 12 D1 pin C8
15	1.0	AN	light blue/black	E15B pin 9 M30B pin 2 F20 pin 2 D2A pin 9
16	1.5	AV	light blue/green	E15A pin 16
18	1.5	RV	red/green	I30 pin 2 D4A pin 7 D5A pin H E15A pin 5

Connector B1D – front harness (white) – up to 01/00

Connector B1D, Junction unit

Pin	mm²	Colour		To
1		G	yellow	N31 pin 2
2	1.0	G	yellow	H10 pin 2
3		G	yellow	N30 pin 2
4	1.0	A	light blue	D2A pin 13 F21 pin 2 E15B pin 16 M30B pin 1
5	1.0	AR	light blue/red	D3 pin F
6	1.0	HR	grey/red	H10 pin 3
7		HR	grey/red	E15A pin 8
9	1.0	B	white	D3 pin D
10	1.5	Z	violet	P10A pin @
11	1.5	Z	violet	P11A pin @
13	1.5	AB	light blue/white	E15A pin 10
14	1.5	S	pink	I30 pin 1 M30B pin 12 J38 pin 30
15	1.0	AN	light blue/black	E15B pin 9 M30B pin 2 F20 pin 2 D2A pin 9
16	1.5	AV	light blue/green	E15A pin 16
18	1.5	RV	red/green	I30 pin 2 D4A pin 7 D5A pin H E15A pin 5

Connector B1I – dashboard harness (white) – from 01/00

Connector B1I, Junction unit

Pin	mm²	Colour		To
4	2.5	CN	orange/black	B98B pin 7 B98B pin 9 H1B pin INT
5	1.5	AR	light blue/red	H5D pin 3
6	1.0	N	black	C20A pin @
7		LN	blue/black	H5D pin 5
8	1.0	CL	orange/blue	D20 pin 19 D20 pin 46 D21A pin 1 G30 pin 2 J60 pin 86 B98B pin 12 D20 pin 5 H20A pin 2
11	1.0	AB	light blue/white	H20A pin 4 D1 pin A4
12	1.5	C	orange	P20A pin 3

Connector B1I – dashboard harness (white) – Euro3

Connector B1I, Junction unit

Pin	mm²	Colour		To
4	2.5	CN	orange/black	B98B pin 7 B98B pin 9 H1B pin INT
5	1.5	AR	light blue/red	H5D pin 3
6	1.0	N	black	C20A pin @
7		LN	blue/black	H5D pin 5
8	1.0	CL	orange/blue	D20 pin 19 D20 pin 46 D21A pin 1 G30 pin 2 J60 pin 86 B98B pin 12 D20 pin 5 H20A pin 2
11	1.0	AB	light blue/white	H20A pin 4 D1 pin A4 D20 pin 15
12	1.5	C	orange	P20A pin 3

Connector B1I – dashboard harness (white) – <03/98

Connector B1I, Junction unit

Pin	mm²	Colour		To
4	2.5	CN	orange/black	B11 pin - H1B pin INT
5	1.5	AR	light blue/red	H5D pin 3
6	1.0	N	black	C20A pin @
7		LN	blue/black	H5D pin 5
8	1.0	CL	orange/blue	D20 pin 19 D20 pin 46 D21A pin 1 G30 pin 2 J60 pin 86 B10 pin - D20 pin 5 H20A pin 2
11	1.0	AB	light blue/white	H20A pin 4 D1 pin 20
12	1.5	C	orange	P20A pin 3

Wiring diagrams

‹ Prev A40 Heater plug Next › B5 MAXI FUSE-1 box

Parts & tools for this job Staging For 1997 Alfa Romeo 156

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