DIN 72552
DIN 72552 is a DIN standard for automobile electric terminal numbers, standardizing almost every contact in an automobile with a
number code.
This table gives most frequently used numbers.
Contact
1
1a, 1b
2
4
4a, 4b
7
15
15a
15e
15
17
19
45
45a
45b
50
50a
50b
50c
50d
50e
50f
50g
50h
15
30
30a
31
31a
31b
Old terminal designition[1]
Meaning
Ignition system
ignition coil, distributor, low voltage
distributor with two separate circuits
breaker points magneto ignition
coil, distributor, high voltage
distributor with two separate circuits, high voltage
terminal on ballast resistor, to distributor
battery+ from ignition switch
from ballast resistor to coil and starter motor
battery+ from ignition switch, also when starter
motor runs
Preheat (Diesel engines)
preheat in
start
preheat (glow)
Starter
starter relay
starter 1 output
starter 2 output
starter control
starter control
starter control
starter control
starter control
starter control
starter control
starter control
starter control
Battery
battery+ through ignition switch
from battery+ direct
from 2nd battery and 12/24 V relay
return to battery- or direct to ground
return to battery- 12/24 V relay
return to battery- or ground through switch
16
16
+
30f, 30h
30h, 30h I
30h II
50
50 II
50b, 50k
50a
50
50a
50
16, 54/15
30/51
85d
31c
return to battery- 12/24 V relay
31, 31a
Electric motors
32
33
33a
33b
33f
33g
33h
33L
33R
49
49a
49b
49c
C
C2
C3
L
R
L54
R54
return
main terminal (swap of 32 and 33 is possible)
limit
field
2. slow rpm
3. slow rpm
4. slow rpm
rotation left
rotation right
Turn indicators
flasher unit in
31
30
54e
30L
30R
15, 15+, 15/54, +, +15
flasher unit out, indicator switch in
54L, S, S4
out 2. flasher circuit
out 3. flasher circuit
1st flasher indicator light
K, K1, P
2nd flasher indicator light
K1, K2, K3, K4
3rd flasher indicator light
K3, K4
indicator lights left
HL, L54, VL
indicator lights right
HR, R54, VR
lights out, left
SBL
lights out, right
SBR
AC generator
51
DC at rectifiers
51e
as 51, with choke coil
59
AC out, rectifier in, light switch
51, 51-, 51a
59a
charge, rotor out
59
64
generator control light
Generator, voltage regulator
61
charge indicator (charge control light)
B+
battery +
51, 51B+, B+30, B+51
Bbattery 31BD+
dynamo/alternator diode+
Ddynamo/alternator diodeDF
dynamo field
DF1
dynamo field 1
DF2
dynamo field 2
U, V, W AC three phase terminals
Lights
54
brake lights
54g
lights
54
55
fog light
N
56
56a
56b
56d
57
57a
57L
57R
58
58d
58L
58R
53
53a
53b
53c
53e
53i
71
71a
71b
72
85c
spot light
headlamp high beam and indicator light
low beam
signal flash
parking lights
parking lights
parking lights left
parking lights right
licence plate lights, instrument panel
panel light dimmer
parking light
parking light
Window wiper/washer
wiper motor + in
limit stop +
limit stop field
washer pump
stop field
wiper motor with permanent magnet, third brush for
high speed
Acoustic warning
beeper in
beeper out, low
beeper out, high
hazard lights switch
hazard sound on
Switches
81
81a
opener
1 out
81b
82
2 out
lock in
82a
82b
1st out
2nd out
82z
82y
1st in
2nd in
83
83a
multi position switch, in
out position 1
83b
out position 2
F
P
PL
PR
58b
58
58
1, 3, 54d, S
54, +2
3, 54e
1, 2
H
Relay
85
relay coil -
Important if relay coil has diode in
parallel
86
relay coil +
Important if relay coil has diode in
parallel
Relay contacts
87
87a
87b
common contact
normally closed contact
normally open contact
30/51
88
88a
common contact 2
normally closed contact 2
30/51 (relay)
88b
normally open contact 2
Additional
52
signal from trailer
54g
75
magnetic valves for trailer brakes
radio, cigarette lighter
77
door valves control
R
EN 50005
A different standard, European Norm (EN) 50005 recommends terminal numbering for general application relays (e.g.
11/12/14/A1/A2 for a SPDT relay) that may nevertheless be applied to automobiles.
References
1. http://www.vintagebus.com/wiring/xref.html
DIN 72552: Klemmenbezeichnungen in Kraftfahrzeugen (Blatt 1, 2, 3, 4)
. DIN. 1971. pp. 1–23.
http://www.bosch-classic.com/media/en/bosch_classic/teile_1/switches/downloads_3/klemmenbezeichnungen.pdf
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