Din 72552

DIN 72552 is a DIN standard for automobile electric terminal numbers, standardizing almost every contact in an automobile with a number code.
A different standard, EN 50005 recommends terminalnumbering for general application relays (e.g. 11/12/14/A1/A2 for a SPDT relay) that may nevertheless be applied to automobiles.
This table gives most frequently used numbers.
Contact Meaning
Ignitionsystem
1 ignition coil, distributor, low voltage
1a, 1b distributor with two separate circuits
2 breaker points magneto ignition
4 coil, distributor, high voltage
4a, 4b distributor with twoseparate circuits, high voltage
7 terminal on ballast resistor, to distributor
15 battery+ from ignition switch
15a from ballast resistor to coil and starter motor
Preheat (Diesel engines)
15 preheatin
17 start
19 preheat (glow)
Starter
50 starter control
Battery
15 battery+ through ignition switch
30 from battery+ direct
30a from 2nd battery and 12/24 V relay
31 return to battery- ordirect to ground
31a return to battery- 12/24 V relay
31b return to battery- or ground through switch
31c return to battery- 12/24 V relay
Electric motors
32 return
33 main terminal (swap of 32and 33 is possible)
33a limit
33b field
33f 2. slow rpm
33g 3. slow rpm
33h 4. slow rpm
33L rotation left
33R rotation right
Turn indicators
49 flasher unit in
49a flasher unit out, indicatorswitch in
49b out 2. flasher circuit
49c out 3. flasher circuit
C 1st flasher indicator light
C2 2nd flasher indicator light
C3 3rd flasher indicator light
L indicator lights left
R indicatorlights right
L54 lights out, left
R54 lights out, right
AC generator
51 DC at rectifiers
51e as 51, with choke coil
59 AC out, rectifier in, light switch
59a charge, rotor out
64 generatorcontrol light
Generator, voltage regulator
61 charge indicator (charge control light)
B+ battery +
B- battery -
D+ dynamo +
D- dynamo -
DF dynamo field
DF1 dynamo field 1
DF2 dynamo field 2
U,...