Common Terminal designations according to DIN 72552

Terminal number / name

Definition

Ignition coil

1

Low voltage

4

High voltage

4a

From ignition coil I terminal 4

4b

From ignition coil II terminal 4

15

Switched positive. Commonly called Ignition Live

15a

Output at the series resistor to the ignition coil and to the starter (Ballast resistor, common on older cars using a lower voltage coil)

Glow-plug and starter switch

17

Start

19

Pre-glow

Battery

30

Battery positive terminal (direct) / commonly called Permanent Live

30a

Battery changeover 12/24v. Battery II positive terminal

31

Ground / Earth wiring. Negative or ground (direct)

31a

Return line to battery II negative

31b

Return wire to battery  negative or ground via switch or relay (switched negative)

31c

Return line to battery I negative

Electric motors

32

Return line *

33

Main terminal *

33a

Self-parking

33b

Shunt field

33f

for second reduced-rpm operation

33g

for third reduced-rpm operation

33h

for fourth reduced-rpm operation

33L

Rotation to left (anti-clockwise)

33R

Rotation to right (clockwise)

* Polarity reversal terminal 32/33 possible

Starter

45

Separate starter-motor relay output;

starter

input (primary current)

Dual starters

parallel activation

Starting relay for pinion-engagement

current

45a

Starter I output

Starter I and II input

45b

Starter II output

Turn-signal flasher (pulse generator)

49

Input

49a

Output

49b

Output to second flasher circuit

49c

Output to third flasher circuit

Terminal

Definition

Wiper motors

53

Wiper motor input (+)

53a

Wiper (+) self-parking

53b

Wiper (shunt winding)

53c

Windscreen washer pump

53e

Wiper (brake winding)

53i

Wiper motor (with permanent magnet and third brush for higher speed)

Lighting

55

Fog lamps

56

Headlamps

56a

High beam with indicator lamp

56b

Dipped beam

56d

Headlamp-flasher contact

57a

Parking lamp

57l

Parking lamp left

57r

Parking lamp right

58

Side-marker, rear, registration-plate and instrument lamps

58L

Left

58R

Right

Alternator and voltage regulators

61

Alternator charge indicator

B+

Battery positive terminal

B-

Battery negative terminal

D+

Alternator positive terminal

D-

Alternator negative terminal

DF

Alternator field winding

DF1

Alternator field winding 1

DF2

Alternator field winding 2

U, V, W

Three-phase terminals

Audio / Entertainment systems

75

Radio cigarette lighter

76

Loudspeaker

Switches

NC contact/changeover contact

81

Input

81a

1st output NC side

81b

2nd output NC side

NO contact

82

Input

82a

1st output

82b

2nd output

82z

1st input

82y

2nd input

Multiple-position switch

83

Input

83a

Output position 1

83b

Output position 2

83L

Output position left

83R

Output position right

Current relay

84

Input output relay contact

84a

Output drive

84b

Output relay contact

Switching relay

85

Output (end of winding negative or ground)

86

Input  (start of winding)

86a

Start of winding/ 1st winding

86b

Winding tap/ 2nd winding

Relay contact for NC contact and changeover contact:

87

Input

87a

1st output (NC side)

87b

2nd output

87c

3rd output

87z

1st input

87y

2nd input

87x

3rd input

Relay contact for NO contact:

88

Input

Relay contact for NO contact and changeover contact (NO contact side):

88a

1st output

88b

output

88c

3rd output

Relay contact for NO contact:

88z

1st input

88y

2nd input

88x

3rd input

Turn-signal lamp

C

1st indicator light

C2

2nd indicator lamp

C3

3rd indicator lamp

(e.g for dual trailer operation)

L

Left-side turn-signal lamp

R

Right-side turn-signal lamp