Subject:
- Terminal codes
Terminal codes:
Terminal codes are defined for electrical installations in motor vehicle technology. In this way confusion (eg abroad) can be avoided and it is faster to read in the diagram (2 digits instead of whole texts). These codes are laid down in the DIN 72552 standard.
Below is the table of the most common encodings:
| Ignition coil, distributor | |
| 1 | Low voltage |
| 4 | high voltage |
| 7 | Control contact |
| 15 | Switched plus (ignition lock output) |
| 15a | Switched plus after the series resistor of ignition coil and starter motor |
| Glow plug switch (diesel engines) | |
| 17 | starten |
| 19 | glow |
| Battery | |
| 30 | Plus of battery |
| 31 | Vehicle mass / battery negative terminal |
| electric motors | |
| 32 | return line |
| 33 | Main connection |
| 33b | shunt field |
| 33L | Direction of rotation Left |
| 33R | Direction of rotation Right |
| Flasher unit (pulse generator) | |
| 49 | Entrance |
| 49a | Exit |
| 49b | Output, second flasher relay |
| Starter motor | |
| 50 | Starter motor control (direct) |
| 50a | Battery transfer relay output for starter motor control |
| Wiper motors | |
| 53 | Wiper motor input (Plus) |
| 53a | Wiper (Plus) limit switch |
| 53b | Wiper, Shunt Winding |
| 53c | Electric Windshield Washer Pump |
| 53e | Wiper, Brake Winding |
| 53 | Wiper motor with permanent magnet and 3rd brush for higher speed |
| Lights | |
| 54 | Brake lights |
| 54G | Rear fog light |
| L | Indicators Left |
| R | Indicators Right |
| 55 | Fog lights |
| 56 | headlights |
| 56a | High beam and indicator light |
| 56b | low beam |
| 56d | High beam signal |
| 57a | Parking lights |
| 57L | Parking lights Left |
| 57R | Parking Light Right |
| 58L | Lighting left |
| 58R | Lighting right, incl. contour and license plate lighting |
| C1, 2 & 3 | Flashing light indicator 1, 2 & 3 |
| Alternator and Voltage Regulator | |
| 61 | Alternator indicator light |
| B+ | Battery Plus |
| B- | Battery Min |
| D+ | Alternator Plus |
| D- | Alternator Min |
| DF (1 & 2) | Dynamo field (1 & 2) |
| U, V, W | Three-phase DC |
| Sound equipment | |
| 75 | Radio, Cigarette Lighter |
| 76 | Loudspeaker |
| Switch | |
| NC and changeover contact switch: | |
| 81 | Entrance |
| 81a | First Exit, Breaker |
| 81b | Second Exit, Breaker |
| 82 | Entrance |
| 82a | First exit |
| 82b | Second exit |
| 82y | Second entrance |
| 82z | First entrance |
| Multi-position switch: | |
| 83 | Entrance |
| 83a | Output, position 1 |
| 83b | Output, position 2 |
| 83L | Exit, Left position |
| 83R | Exit, Right position |
| Switching relay | |
| 85 | Relay negative side control current |
| 86 | Relay plus side control current |
| 86a | Winding start or first winding |
| 86b | Winding tap or second winding relay contact |
| 87 | Relay main power connection |
| 87a | Relay main power connection 2 (changeover or break relay) |
| 88b | Normally open contact |
| 88 | Relay contact input with NC and changeover contact |
| 88a | Normally closed contact 2 |
| 88b | Normally open contact 2 |
| 88c | Third exit |
| Extras | |
| 52 | Trailer signal |
| 54g | Solenoid valves for trailer brakes |
| 77 | door signal |
