Terminal Designations The purpose of the terminal designation sys tem for automotive electrical systems is to enable easy and correct connection of the conductors to the various devices, particularly in the event of repairs and equipment replacement. The terminal designations do not identify the conductors, because devices with different terminal designations can be connected at the two ends of each conductor. For this reason, the terminal desig nations need not be written on the lines which des ignate conductors. Terminal Designations: Examples Term. Definition Ignition coil, ignition distribu tor 1 Low voltage Ignition distributor with two separate elec trical circuits 1a To contact breaker I 1b To contact breaker II Ignition coil, ignition distributor, 4 high voltage Ignition distributor with two separate elec trical circuits 4a From ignition coil I 4b From ignition coil II 15 Switched (+) downstream of bat tery (output of ignition/driving switch) Output at ballast resistor to igni tion 15a coil and starter Glow plug and starter switch 17 Start 19 Preheat Battery 30 Input from battery (+) terminal, direct 12/24 V series-parallel battery s- witch 30a Input from (+) terminal of battery II Return line from battery, 31 battery negative terminal, or ground, direct 31b Return line to battery negative terminal, or ground via switch or relay (switched negative) 12/24 V series-parallel battery switch 31a Return line to battery II, negative 31c Return line to battery I, nega tive Electric motors 32 Return line 33 Main terminal connec tion A list of all terminal designations is given in DIN 72552. In addition, designations in accordance with DIN-VDE Standards for electrical machines can also be used. If in the case of multiple-contact connections the number of terminal desig nations as per DIN 72552 does not suffice, the terminals are consecutively numbered using numbers or letters whose representa tions of specific functions are not standard ized. The terminal designations in the Ta ble below only serve as examples. Term. Definition 33a Self-parking switch-off 33b Shunt field 33f For second lower-speed range 33g For third lower-speed range 33h For fourth lower-speed range 33L Counterclockwise rotation 33R Clockwise rotation Starters 45 Separate starter relay, output; starter, input (main cur rent) Two-starter parallel opera tion Starting relay for engagement cur rent 45a Output, starter I Input, starters I and II 45b Output, starter II 48 Terminal on starter and on start-repeating relay for monitoring starting proce dure Turn-signal flashers (pulse generators) 49 Input 49a Output 49b Output, second turn-signal circuit 49c Output, third turn-signal cir cuit Starters 50 Starter control (direct) Series-parallel battery switch 50a Output for starter control Starter control 50b with parallel operation of two starters with sequential con trol Starting relay for sequential control of the engagement current during parallel operation of two starters 50c Input at starting relay for starter I Term. Definition 50d Input at starting relay for starter II Start-locking relay 50e Input 50f Output Start-repeating relay 50g Input 50h Output Wiper motors 53 Wiper motor, input (+) 53a Wiper (+), self-parking switch-off 53b Wiper (shunt winding) 53c Electric windshield-washer pump 53e Wiper (brake winding) 53i Wiper motor with permanent magnet and third brush (for higher speed) Lighting 55 Fog lamp 56 Headlamp 56a High, beam, high-beam indicator lamp 56b Low beam 56d Headlamp-flasher contact 57a Parking lamp 57L Parking lamp, left 57R Parking lamp, right 58 Side-marker lamps, tail lamps, license plate lamps and instrument panel lamps 58L License-plate lamp, left 58R License-plate lamp, right Alternators and voltage regula tors 61 Alternator charge-indicator lamp B+ Battery positive B- Battery negative D+ Dynamo positive D- Dynamo negative DF Dynamo field DF1 Dynamo field 1 DF2 Dynamo field 2 U,V,W Alternator terminals Acoustics 75 Radio, cigarette lighter 76 Speakers Switches Break contact (NC) and changeover switches 81 Input 81a Output 1, NC side 81b Output 2, NC side Make contact (NO) switches 82 Input 82a Output 1 82b Output 2 Term. Definition 82z Input 1 82y Input 2 Multiple-position switches 83 Input 83a Output, position 1 83b Output, position 2 83L Output, left-hand position 83R Output, right-hand posi tion Current relays 84 Input, actuator and relay contact 84a Output, actuator 84a Output, relay contact Switching relays 85 Output, actuator (end of winding to ground or negative) 86 Input, actuator (start of winding) 86a Start of winding or 1st winding 86b Winding tap or 2nd wind ing Relay contact for break (NC) and changeover contacts: 87 Input 87a Output 1 (NC side) 87b Output 2 87c Output 3 87z Input 1 87y Input 2 87x Input 3 Relay contact for make (NO) con tact 88 Input Relay contact for make (NO) and changeover contacts (make side): 88a Output 1 88b Output 2 88c Output 3 Relay contact for make contact (NO): 88z Input 1 88y Input 2 88x Input 3 Directional signals (turn signal flashers) C Indicator lamp 1 C0 Main terminal connection for separate indicator circuits actuated by the turn signal switch C2 Indicator lamp 2 C3 Indicator lamp 3 (e.g., when towing two trailers) L Turn-signal lamps, left R Turn-signal lamps, right