DIN 72552
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Automobile electric terminal numbers according to DIN 72552
For almost every contact in a car there is a number code to standardize car wiring. These numbers are defined in DIN 72552.
This table gives most frequently used numbers.
| Contact | Meaning |
| Ignition system | |
| 1 | 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 two separate 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 | preheat in |
| 17 | start |
| 19 | preheat (glow) |
| 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- or direct 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 32 and 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, indicator switch 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 | indicator lights 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 | generator control light |
| Generator, Generator voltage regulator | |
| 61 | charge control light |
| B+ | Battery + |
| B- | Battery - |
| D+ | Dynamo + |
| D- | Dynamo - |
| DF | Dynamo field |
| DF1 | Dynamo field 1 |
| DF2 | Dynamo field 2 |
| U, V, W | AC three phase terminals |
| lights | |
| 54 | brake lights |
| 55 | fog light |
| 56 | spot light |
| 56a | high beam and indicator light |
| 56b | low beam |
| 56d | signal flash |
| 57 | parking lights |
| 57a | parking lights |
| 57L | parking lights left |
| 57R | parking lights right |
| 58 | licence plate lights, instrument panel |
| 58d | panel light dimmer |
| window wiper/washer | |
| 53 | wiper motor + in |
| 53a | limit stop+ |
| 53b | limit stop field |
| 53c | washer pump |
| 53e | stop field |
| 53i | wiper motor with permanent magnet, third brush for high speed |
| acoustic warning | |
| 71 | beeper in |
| 71a | beeper out, low |
| 71b | beeper out, high |
| 72 | hazard lights switch |
| 85c | hazard sound on |
| switches | |
| 81 | opener |
| 81a | 1 out |
| 81b | 2 out |
| 82 | lock in |
| 82a | 1st out |
| 82b | 2nd out |
| 82z | 1st in |
| 82y | 2nd in |
| 83 | multi position switch, in |
| 83a | out position 1 |
| 83b | out position 2 |
| Relay | |
| 85 | relay coil - |
| 86 | relay coil + |
| Relay contacts | |
| 87 | common contact |
| 87a | normally closed contact |
| 87b | normally open contact |
| 88 | common contact 2 |
| 88a | normally closed contact 2 |
| 88b | normally open contact 2 |
| additional | |
| 52 | signal from trailer |
| 54g | magnetic valves for trailer brakes |
| 75 | Radio, cigarette lighter |
| 77 | door valves control |