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Info guides and mods

Connection Reference Numbers

Modification Details




KL is the abbreviation for 'klemme' which is the German term for connector / connection.
The Klemme KL code tells you how a power or earth wire functions on a diagram.

Used On Smart Wiring Diagrams

KL15 is ignition switched live
KL30 is battery permanent live
KL31 is battery negative, connected all the time



Not Used On Smart Wiring Diagrams

KL50 is ignition position #3 (start)
KLR means ignition switch position #1 (accessory)

Ignition Switch Position

Ign 1 - KLR
Ign 2 - KL15
Ign 3 - KL50

Smart Ignition Switch Positions

Smart only use 3 positions unlike many other cars that use 4.

Off
Accessory
Start

How Is This Handy?

Well, to be honest, for you it might not be but I look at smart wiring diagrams every day and I really
needed somewhere I could put this information so I could quickly view it to refresh my memory.

DIN 72552

Ignition coil



1 Low voltage

4 High voltage

4a From ignition coil I, terminal 4

4b From ignition coil II, terminal 4

15 Switched positive after battery (ignition-switch output)

15a Output at the series resistor to the ignition coil and to the starter

 
Glow-plug and starter switch



17 Start

19 Preglow



Battery



30 Line from battery positive terminal (direct)

30a Battery changeover 12/24 V Line from battery II positive terminal

31 Return wire from battery negative or ground (direct)

31b Return wire to battery negative or ground via switch or relay (switched negative)



Battery changeover relay 12/24 V

31a Return line to battery II negative

31c Return line to battery I negative

 
Electric motors


32 Return line

33 Main terminal

33a Self-parking

33b Shunt field

33f for second reduced-rpm operation

33g for third reduced-rpm operation

33h for fourth reduced-rpm operation

33L Rotation to left (counterclockwise)

33R Rotation to right (clockwise)

 
Starter
 
45 Separate starter-motor relay, output; starter, input (primary current)
 

Dual starter
 
45a Starter I output, Starter I and II input 
45b Starter II output 
48 Terminal on starter and start repeating relay (monitoring the starting process) 
 
Turn-signal flasher
 
49 Input 
49a Output 
49b Output to second flasher circuit 
49c Output to third flasher circuit 
 
Starter 
 
50 Starter control (direct)
 
Battery changeover relay
 
50a Output for starter control 
 
Starter control 
 
50b In parallel operation of two starter motors with sequence control 
 
Starting relay for sequence control of engagement current in parallel operation of two starter motors 
 
50c Input at starting relay for starter I 
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

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 lamps

56 Headlamps

56a High beam with indicator lamp

56b Low beam (dipped beam)

56d Headlamp-flasher contact

57a Parking lamp

57L Parking lamp, left

57R Parking lamp, right

58 Side-marker, tail, license-plate and instrument lamps

58d Adjustable instrument lighting
58L left

58R right



Alternators and voltage regulators

61 Alternator charge indicator

B+ Battery positive terminal

B– Battery negative terminal

D+ Alternator positive terminal

D– Alternator negative terminal

DF Alternator field winding

DF1 Alternator field winding 1

DF2 Alternator field winding 2

U, V, W Three-phase terminals



Audio systems



75 Radio, cigarette lighter

76 Loudspeaker



Switches



Normally closed contact/changeover contact



81 Input

81a 1st output, NC side

81b 2nd output, NC side



Normally open contact


82 Input

82a 1st output

82b 2nd output

82z 1st input

82y 2nd input



Multiple-position switch


83 Input

83a Output, position 1

83b Output, position 2

83L Output, position left

83R Output, position right
 

 
Current relay
 

84 Input, output, relay contact
84a Output, drive

84b Output, relay contact

 
Switching relay 
 
85 Output, drive (end of winding negative or ground) 
86 Input, drive (start of winding)

86a Start of winding / 1st winding
86b Winding tap / 2nd winding
 

Relay contact for NC contact and changeover contact

87 Input
87a 1st output (NC side) 
87b 2nd output

87c 3rd output

87z 1st input
87y 2nd input 
87x 3rd input
 
Relay contact for NO contact
 
88 Input
 
Relay contact for NO contact and changeover contact (NO contact side)
 
88a 1st output
88b 2nd output 
88c 3rd output
 
Relay contact for NO contact
 
88z 1st input
88y 2nd input 
88x 3rd input
 
Turn-signal lamp (turn-signal flasher) 
 
C 1st indicator light 
C0 Main terminal for check circuits separate from flasher 
C2 2nd indicator lamp
C3 3rd indicator lamp (e.g for dual trailer operation)
L Left-side turn-signal lamp 
R Right-side turn-signal lamp

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