DIN Standard Terminal Designations

(I stole this file from a Q lister who was cool enough to put a text version of it on his web site. I copied it and messed it up a bit to reduce the number of pages. I hope this is of some use to someone out there... sorry I didn't keep track of who I stole it from!)

The purpose of the terminal designation system 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 designations need not be written on the lines which designate conductors.

1 Ignition coil, ignition distributor - Low voltage
1a To contact breaker I (Ignition distributor with two separate circuits)
1b To contact breaker II (Ignition distributor with two separate circuits)
4 Ignition coil, ignition distributor - high voltage
4a From ignition coil I (Ignition distributor with two separate circuits)
4b From ignition coil II (Ignition distributor with two separate circuits)
15 Switched (+) downstream of battery (output of ignition/driving switch)
15a Output at ballast resistor to ignition coil and starter
17 Glow plug and starter switch - Start
19 Glow plug and starter switch - Preheat
30 Input from battery (+) term., direct 12/24 V series-parallel battery switch
30a Input from (+) terminal of battery II
31 Battery negative terminal, or ground, direct
31b Return line to battery negative terminal, or ground via switch or relay (switched negative)
31a Return line to battery II, negative (12/24 V series-parallel battery switch)
31c Return line to battery I, negative (12/24 V series-parallel battery switch)

Electric motors
32 Return line 33 Main terminal connection

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 designations as per DIN 72552 does not suffice, the terminals are consecutively numbered using numbers or letters whose representations of specific functions are not standardized. The terminal designations in the Table below only serve as examples.

Starters
45 Separate starter relay, output; starter, input (main current)

Two-starter parallel operation - Starting relay for engagement current
45a Output, starter I, Input, starters I and II
45b Output, starter II
48 Terminal on starter; on start-repeating relay for monitoring starting

Turn-signal flashers (pulse generators)
49 Input
49a Output
49b Output, second circuit
49c Output, third circuit

Starter control
50 Starter control (direct)
50a Series-parallel battery switch - Output for starter control
50b with parallel operation of two starters with sequential control
Starting relay for sequential control of the engagement current
during parallel operation of two starters
50c Input at starting relay for starter I
50d Input at starting relay for starter II
50e Start-locking relay Input
50f Start-locking relay Output
50g Start-repeating relay Input
50h Start-repeating relay 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, tail, license plate, and instrument panel lamps
58L License-plate lamp, left
58R License-plate lamp, right

Alternators and voltage regulators
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

75 Radio, cigarette lighter
76 Speakers

Make contact (NO) switches
82 Input
82a Output 1
82b Output 2
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 position

Relays
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 winding

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) contact and changeover contacts
88 Input
88a Output 1
88b Output 2
88c Output 3
88z Input 1
88y Input 2
88x Input 3

Directional signals (turn signal flashers)
C Indicator lamp 1
C2 Indicator lamp 2
C0 Main terminal connection for separate indicator circuits actuated by the turn signal switch
C3 Indicator lamp 3 (e.g., when towing two trailers)
L Turn-signal lamps, left
R Turn-signal lamps, right