Bosch Terminal Designations

From Bosch Automotive Handbook, 3rd edition
Terminal Designations (Excerpts from DIN Standard 72 552) The terminal
designations do not identify the wires, because devices with different
terminal designations can be connected at the two ends of each wire.  If
the number of terminal designations is insufficient (multiple-contact
connections), the terminals are consecutively numbered using numbers or
letters whose representations of specific functions are not standardized.
 Terminal  Definition
 1         Ignition coil, ignition distributor, low voltage
           (Ignition distributor with two separate electrical circuits)
 1a        to ignition contact breaker I
 1b        to ignition contact breaker II
 2         short-circuit terminal (magneto ignition)
 4         Ignition coil, ignition distributor, high voltage
           (ignition distributor with two separate electrical circuits)
 4a        from ignition coil I, terminal 4
 4b        from ignition coil II, terminal 4
 15        Switched + downstream of battery
           (output of ignition/driving switch)
 15a       Output at dropping resistor to ignition coil and starter
 17        Start
 19        Preheat
 30        input from + battery terminal, direct
 30a       input from + terminal of battery II
           (12/24 V series-parallel battery switch)
 31        Return line to battery
           - battery terminal or ground, direct
 31b       Return ine to negative battery terminal or ground, via switch
           or relay (switched negative)
           (12/24 V series-parallel battery)
 31a       Return line to - terminal of battery II
 31c       Return line to - terminal of battery I
 32        Return line
           (Polarity reversal possible at terminals 32-33)
 33        Main terminal connection
           (Polarity reversal possible at terminals 32-33)
 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
 45        Separate starter relay, output; starter input (main current)
 45a       Output, starter I
           Input, starters I and II (Two-starter parallel operation)
 45b       Output, starter II       (Two-starter parallel operation)
 48        Terminal on starter and on start-repeating relay for
           monitoring starting procedure
 49        Input
 49a       Output
 49b       Output, second turn-signal circuit
 49c       Output, third turn-signal circuit
 50        Starter control (direct)
 50a       Output for starter control
           (Series-parallel battery switch)
 50b       Starter control with parallel operation of two starters with
           sequential control
 50c       Input at starting relay for starter I
           (Starting relay for sequential control of the engagement
           current during parallel operation of two starters)
 50d       Input at starting relay for starter I
           (Starting relay for sequential control of the engagement
           current during parallel operation of two starters)
 50e       Input, Start-locking relay
 50f       Output, Start-locking relay
 50g       Input, Start-repeating relay
 50h       Output, Start-repeating relay
 51        DC voltage at rectifier
 51e       DC voltage at rectifier with choke coil for daytime driving
 52        Signals from trailer to towing vehicle, general
           WIPER MOTOR
 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
 54        For lamp combinations and trailer plug connections
 54g       Pneumatic valve for additional retarding brake,
           electromagnetically actuated
 55        Fog lamps
 56        Headlamp
 56a       High beam, high-beam indicator lamp
 56b       Low beam
 56d       Headlamp-flasher contact
 57        Side-marker lamp: motorcycles, mopeds.
           Abroad also cars, trucks, etc.
 57a       Parking lamp
 57L       Parking lamp, left
 57R       Parking lamp, right
 58        Side-marker lamps, tail lamps, license-plate lamps and
           instrument-panel lamps
 58b       Tail-lamp changeover for single-axle tractors
 58c       Trailer plug-and-receptacle assembly for single-conductor
           tail-lamp cable with fuse in trailer
 58d       Variable-intensity instrument-panel lamp, tail-lamp and
           side-marker lamp
 58L       Side-marker lamp, left
 58R       Side-marker lamp, right; license-plate lamp
           ALTERNATOR (magneto, generator)
 59        AC voltage, output
           Rectifier, input
 59a       Charging armature, output
 59b       Tail-lamp armature, output
 59c       Stop-lamp armature, output
 61        Alternator charge-indicator lamp
 71        Input
 71a       Output to horns 1 & 2, low
 71b       Output to horns 1 & 2, high
 72        Alarm switch (rotating beacon)
 75        Radio, cigarette lighter
 76        Speaker
 77        Door-valve control
 ----------(Break-contact and changeover switches)----------------------
 81        Input
 81a       1st output, break side
 81b       2nd output, break side
 ----------(Make-contact switches)--------------------------------------
 82        Input
 82a       1st output
 82b       2nd output
 82z       1st input
 82y       2nd input
 ----------(Multiple-position switches)---------------------------------
 83        Input
 83a       Output, position 1
 83b       Output, position 2
 83L       Output, left-hand position
 83R       Output, right-hand position
           CURRENT RELAY
 84        Input, actuator and relay contact
 84a       Output, actuator
 84b       Output, relay contact
 85        Coil ground
 86        Coil feed
 86a       Start of coil winding or 1st winding
 86b       Coil winding tap or 2nd winding
 87        Output (NO)
 87a       Output (NC)
 87b       Output (NO, isolated contact)
 87c       Output, special purpose
 87z       Output, special purpose
 87y       Output, special purpose
 87x       Output, special purpose
 88        Trigger actuator
 88a       Trigger, special purpose
 88b       Trigger, special purpose
 88c       Trigger, special purpose
 88z       Trigger, special purpose
 88y       Trigger, special purpose
 88x       Trigger, special purpose
 B+        Battery positive
 B-        Battery negative
 D+        Dynamo postive
 D-        Dynamo negative
 DF        Dynamo field
 DF1       Dynamo field 1
 DF2       Dynamo field 2
 ----------(Alternator with separate rectifier)--------------------------
 J         Excitation winding positive
 K         Excitation winding negative
 Mp        Center point terminal
 U,V,W     Alternator terminals
           DIRECTION INDICATOR (turn-signal flasher)
 C         First indicator lamp
 C0        Main terminal connection for separate indicator circuits
           actuated by the turn-signal switch
 C2        Second indicator lamp
 C3        Third indicator lamp (e.g., when towing two trailers)
 L         Turn-signal lamps, left
 R         Turn-signal lamps, right

Cross-reference for old and new terminal designations in accordance with
DIN 72 552. Only terminal designations whose significance has altered are
 OLD           NEW
 1             1, 53(wiper), 53e
 2             2, 53e
 3             53, 53b(wiper)
 4             4, 53a, 53b(wiper)
 15            15, 49(turn-signal flasher)
 15+           49
 15/54         15, 49, 54
 16            15a, 15
 30            30, 33(motor)
 30/51         30, 87, 88(relay)
 30f           45
 30h           45, 45a
 30h I         45a
 30h II        45b
 30L           33L (motors)
 30R           33R (motors)
 31            31, 31c, 32(motors)
 31a           31a, 31c
 31B-          B-
 50            50, 50b, 50f, 50h
 50a           50, 50a, 50e, 50g
 50b           50d
 50k           50d
 50 II         50c
 51            51, 59, B+
 51 -          59
 51a           59
 51B+          B+
 54            54, 53a, 54g
 54/15         15
 54d           53(wiper)
 54e           33b, 53b(wiper)
 54L           49a
 58            58, 58L, 58R
 58b           58b, 58d
 59            59a
 85d           31b(alarm switch)
 B+30          B+
 B+51          B+
 D+/61         D+
 D-/61         D-
 H             71
 HL            L (L54b)
 HR            R (R54b)
 K             C
 K0            C0
 K1            C, C2
 K2            C2
 K3            C2, C3
 K4            C2, C3
 L54           L (L54)
 N             55
 P             C, 57a
 PL            57L
 PR            57R
 R             R, 75
 R54           R, (R54)
 R54b          Rb
 S             49a, 53(wiper)
 S4            49a
 SBL           (L54)
 SBR           (R54)
 VL            L
 VR            R
 +             15, 49(turn-signal flasher)
               53, 53a(wiper)
 +2            53a
 +15           49
 -             1 (ignition coil), 31
Power consumption of vehicle electrical leads (typical values)
Backup lamps                       27W each
Battery ignition                   20W
Blower motor                       80W
Cigarette lighter                 100W
Front Fog Lamps                    35-55W each
Red Rear Fog Lamp                  27W
Diesel glow plugs                  100W each
Headlamps, low beam                42-70W each
Headlamps, high beam               42-75W each
Heated rear window                 120W
Horns                              25-40W each
Dashboard lamps                    2W each
Interior (dome) lamp               5W each
License plate lamp                 5-10W each
Parking lamp                       3-8W each
Factory Radio                      10-50W
Sidemarker lamps                   4-8W each
Starter motor                      800-3,000W
Stop (brake) lamps                 27W each
Tail lamps                         4-10W each
Turn-signal lamps                  27W each
Vehicle heater                     20W...60W
Windshield wiper                   90W