RETRO 420D.pdf

Component Location (Volume 1)

4

Power Port

G-9

C

111

RD

Brake Power

 Alternator

E-1

5

Relay - A/C Shutoff

I -8

A

113

OR

Operator Monitor Power

ConnectorLocation ConnectorNumber 

Schematic

Machine

Location

Location

 A-15,C-14, B-13 34 F-15 57 C 1- 3, I 1- 2 59NA ,60 COS C-13 57 H-12, -I12 62 H-12, -I12 62 G-12 63 D-11, B-14 64 D-11 63 G-11 A H-11 A H-11 A I-10 63 I-10 63 F-10 A F-10 A F-10 A I-8 A D-8 A I-4 18 H-4 18 H-4 D G-4 D F-4 D I-3 10 H-2 25 H-2 25 E-1 25 I-15, F-1 45 F-1 12 E-10 A F-2 18 C-9 42 H-6 D C-10 2 C-15 8 H-6 24

CONN1 CONN 2 CONN 3 CONN 4 CONN 5 CONN 6 CONN 7 CONN 8 CONN 9 CONN 10 CONN 11 CONN 12 CONN 13 CONN 14 CONN 15 CONN 16 CONN 17 CONN 18 CONN 19 CONN 20 CONN 21 CONN 22 CONN 23 CONN 24 CONN 25 CONN 26 CONN 27 CONN 28 CONN 29 CONN 30 CONN 33 CONN 37 CONN 50 CONN 54 CONN 60 CONN 62 CONN 64

Theconnectorsshown inthischart arefor harnessto harnessconnectors. Connectorsthatjoi t orsthatjoinaharnesstoacomponentaregener allylocatedatornear  a tedatornear  thecomponent. Seethe ComponentLocation Chart.

0 16 8

B atte yr V otla ge B eol w N or m a l

0 26 8

E r ar tci p r og r a mme d p aar m e t e ra f ul t

PU

Backlighting

24

R el a y - Al lW he e l D ir ve Br ak ni g

C

115

RD

H-1

25

Relay - Attachment

D-6

C

116

BR

Rear S td Flood Power

618

YL

Right T ail L ight

D -4

6

Relay - Aux Lighting

B-6

B

117

YL

Rear Aux Flood Power

619

GN

Low Beam Headlamps

D -4

6

Relay - Aux Flood

D-10

B

118

GY

Front Wiper Power

620

WH

Front Attachment Flood Lights

D-12

PK

Rear Wiper Power

YL

Rear Fog Light

Block -L -Lighting Diode

 A

Relay - Cab

F-1

86

Relay - High Speed

H-6

24

Relay - HVAC

G-9

 A

Relay - Main

D-7

C

R el a y - Pr es su er Sw Sw ti ch Ti Ti me r

A-7

B

Relay - Start

B-7

B

Relay - Std Flood

Coil -T -Thermal Starting Aid Control -S -Shutt le Handle Flasher Fuse -A -Air Conditioning Fuse -A -Air Suspension Seat Fuse -A -All Wheel Drive

Acc Socket Power

617

BR

C-6

C

119

H-9

 A

122

BU

123

WH

XMSN Power

PK

RTD Power

C510

WH

Engine L ow Speed f rom Tachometer  

RD

Start A id Power

C511

WH

Engine Stallout Relay

YL

Ride Control Power

C568

WH

HVAC B lower M ot or  

GN

AWS Power

E528

PU

C

B-6

B

128

G 1- 3

 A

131

B-6

B

134

D-10

 A

136

B

143

BR

D-6

HVAC Power

627 630 642

GY WH

C

Relay - Std Lighting

B-7

B

Resistor -M -Motor Speed

H-9

144

GN

Beacon Power

E540

PK

MP Solenoid Common S upply Power  

B-7

B

S e nder - Conv e r et r Te m per a t u r e

F- 1

12

157

YL

Front Aux Flood Power

E543

WH

MP Close Proport oinal Return

Fuse -Aux Hydraulics

C-7

C

Sender -C -Coolant Temperature

H-1

13

158

BR

Front Std Flood Power

E544

GN

MP Open Proportional Return

Fuse - Beacon

D-7

C

Sender - Fuel Level

G-1

11

1 61

RD

F al sh er P ow er  

Fuse -Bucket Position

B-7

B

Sensor -B -Bucket P osition

I-15

16

1 63

WH

E el tc ir c MP Po Po we r (A u x . Hy Hy dr au il cs )

7 02

OR

B ar ke Sw ti ch B To AW AW DR DR el a y

Fuse - Engine

B-7

B

Solenoid -B -Bucket Posit ion

F-2

17

170

RD

Dome Light Power

710

GN

Transmission Speed S ensor  

Fuse - Front Wiper

D-7

C

Solenoid -C -Cold Start Advance

F-1

31

180

R D

Powered Air Seat Power

720

PU

Brake Switch At Ato AWD Relay

Fuse - Horn

A-7

B

S o le n oid - For war dT ar ns m is is o n

I 1-

18

184

BU

Rear End Pow e r

752

YL

Std Transmission Forward Sol Out p ut

Fuse - Key Start

A-7

B

Solenoid - Front Drive

G-1

19

Fuse - Left Tail Lamp

D-7

C

Solenoid - Fuel Shutoff

Fuse - Monit or

C-7

B

Solenoid -H -Hydraulic Shutoff

15

E-1

20

H-12

91

B

Solenoid - P ilot Shutoff

H-12

Fuse - Radio

A-7

B

S ol en o i dd- Pi Pi ol tH tH yd ar u l ci s S hu t of f

H1 - 3

91

Fuse -R -Rear Hydraulics

B-7

B

S o le n oid - Reve sr eT ar ns m is is o n

I 1-

18

Fuse -Rear S td Floods

A-7

C

Solenoid -S -Side Shift Lock

H-12

93

Fuse - Power Port

B-7

Fuse - Rear Wiper

C

D-7

Switch -A -Air Filter Pressure

C

I-3

92

10

Fuse - Ride Control

C-7

Swit ch - All Wheel D rive

F-2

Fuse - R ight Tail Lamp

D-7

C

Swit ch - Atch Front Flood

D-13

Fuse - Signal Lamp

A-7

B

Switch - At ch Rear Flood

D-13

A

Fuse - Spare 1

D-7

B

Switch - Backhoe H andle Pushbutton

H-13

85

Fuse - Spare 2

D-7

C

Swit ch - Backhoe H andle Pushbutton

I -13

85

B

Switch - Backhoe Hydraulic Shutoff

D-15

A

Fuse - Start

B-7

C

Switch - Beacon

E-13

A

B-7

B

Switch - Blower Speed

H-10

A

G au g e - Co n v er e t rT rT em p e ar ut er

F1 - 3

 A

Switch - Brake A

I-6

22

G au g e - Co o l an tT tT em pe ar ut er

F1 - 3

 A

Switch - Brake B

I-6

22

Gauge - Fuel Level

F-12

 A

Switch - Brake Fluid L evel

I-3

10

Gauge - Tachometer

F-12

 A

Switch -C -Cold St a rt Temperature

F-1

5

Fuse - Start Aid

C-7

Fuse - Transmission

I -8

 A

Switch -C -Coolant Temperature

H-1

3

F-14

 A

Swit ch -E -Engine Oil Pressure

H-1

20

Ground - Cab

D-4

87

Swit ch - Front Horn

D-2

D

Ground - Engine

D-1

12

Switch -F -Front Roading Lamps

F-2

3

Ground - Engine

D-3

89

Switch - Hazard

D-4

90

Sw ti h c - He a t e r / Ai rC rC o ndi io t n ing

E -2 G- 1 0

GroundCircuits

D

E529

YL

754

BU

StdTran s missionRe smis s ionReverseSolOutp e SolOutp ut ut

BK

Main Chassis

755

OR

Transmission Fourth Gear Sol

BK

XMSN G round

762

YL

Bucket P osition Solenoid

203

BK

Electric MP Ground

766

Start Relay Ground D e ad Engin eLow e r En Enabl eG oru n d

BK

ECM Harn Code 5

922

BR

Std Transmission Forward Sol Return

 A250

BK

MSSLEDGround

923

GY

StdTransmissionReverseSolReturn

Starter Solenoid St a r tR tR e l a y Co Coil

911

9 44 945 963

WH

Neutralizer Switch

BK B K

281

WH

779

GN

218 265

304

YL

OR BR

Cat Data Link (-)

G N OR

Keyswitch S tart

973

BR

ECM Auto-Manual M ( an) Sw Input

308

YL

Keyswitch Run

975

WH

ECM Transmission Sol Return

309

GY

Alt ernator Failure

976

OR

Ride Control Solenoid

310

PU

Starting A id Coil

977

YL

ECM Auto-Manual A ( ut) Sw n I put

321

BR

Backup Alarm Sig

991

WH

Transmission Neutralizer to EC M

A972

GN

C at D at a Li nk ( +)

30 6

322

GY

Front Horn

P K

Engi n e Shut d ow nS nSol e noi d

3 34

BU

C ol dS a t tr Ad Ad va n c eS eS ol e n oi d

C 72 0

BU

Ta r n s mi s oi nN eu rt al L o ck

3 38

PK

Ma i nR nR el ay Si Si g n al fo fo rA rA ux .R .R el a ys

C 88 3

GY

B or o m An An g l eT eT li t L e tf

367

BU

Rear Horn

 A313

C 701

OR

Pi olt Hy Hydr a ul ci sB sBuc e kt Po Pos tioi n Det ent Sol e noi d

32 7

YL

C884

OR

C885

PK

ECM to Ride Control Relay Par kB ar ke Enabl ef o r Au Aut o s h if t

Stabilize rLegAlarm rLegAlarm

BU

MSSECMtoStart RelayCoil

C920

GY

ECMDiagnostic

GN

MSSECMtoMainRelayCoil

E701

PK

RideControlAutoMode

E70 2

OR

F-7

 A

Switch - Heater Vent

H-7

A

405

GY

Low Oil Pressure

E764

OR

Circle Steer Solenoid

E-7

 A

Sw ti ch - Hy d r a ul ci Fi tl er Pr e ss u r e

G- 1

32

406

PU

High Coolant Temp

E803

YL

Left Angle/Steer Sw

Ground - Top of Cab

C-12

1

Switch - Key Start

F-14

A

407

PK

Converter High Temp

E804

BU

Right Angle/Steer Sw

Group - Basic Lamp

H-15

 A

Switch -L -Loader Neutralizer

C-8

85

419

YL

Parking Brake Sw

F738

WH

Loader Cylinder Rod End Press Sw

Group - Fault Lamp

F-15

 A

Switch - Neutral Lock

G-2

D

42 9

YL

R e ar St e rP o si io t nSen o sr

F 7 39

G N

R die Co n t or l Sw to to Rel a y

42

430

BU

Dirty Air Filter Full Water Separator

Group -F -Function Lamp

E-4

D

Switch - Park Brake

Horn - Backup Alarm

H-13

Horn - Forward

G-12

C-8

4

Switch - Rear Horn

D-14

A

439

YL

26

Switch -R -Rear Washer /W /Wiper

E-14

A

441

OR

C oolant Temp Sig

I-13

4

Switch -R -Refrigerant Pressure

I 1-

25

443

YL

Convert e r Temp Sig

F871

PU

Rear Steer Left Solenoid + ()

Lamp - Left Headlight

H-2

95

Switch - Return To Dig

I-15

26

447

PK

Fuel L evel Sig

F872

BU

Rear Steer Right Solenoid + ()

Lamp -R -Right Headlight

G-2

96

Switch - Side Shift Lock

E-15

A

450

YL

Tachometer Sig

F877

WH

Rear Steer Right Relay + ()

24

483

BR

Low Brake Fluid

F879

PK

Rear Steer L eft Relay (+)

A

E455

BR

Dirty Hydraulic Oil Filter

G703

GN

Dead Engine Lower  

A

G 42 3

PK

H gi h Hy d r . Fi tl er P er s ur e T (m i er )

G 72 6

GY

Sh uo t ff S o le n oi d( +)

500

BR

Front Wiper Park Switch

Motor - Front Wiper

D-2

24

Switch - Stalk

I 1- 1

29

I-3

E-13

Switch - Std Front Flood

G-11

2

Switch - Std Rear Flood

G-11

A

H -8

30

Switch - Thermostat

I -7

97

I-3

56

501

G N

F or nt Wi Wi p er Mot or - L o wS wSpe e d

G 7 8 9

B R

AW SM SMode - Ci crl eSt eer (+ )

G-1

36

502

O R

F or nt Wi Wi p er Mot or - Hi g h Speed

G 7 9 5

O R

AW SM o de - Rea rS et er (+ (+)

R i de C o n t r ol R e al y O p e n Cri c ui t

Machinelocatio nsarerepeatedforcomponentslocatedclosetogether. nsarerepeatedforcomponentslocatedclosetogether.

R i de C o n t r ol R e al y S h o r to t B atte yr

 A=Locatedinside/onrightconsole. B=Locatedin machineelectric alcenter1. alcenter1.

I n va il d R di e C o n t or l S wi t ch I n p ut T r an sm i s i o n a ut o m / an o p e n c i cr uti

C= Locatedinmachineelectrica lcenter2. lcenter2.

T r an sm i s i o n a ut o m / an g r ou nd ed

D= Locatedinside/o nfrontconsole. nfrontconsole.

0 52 0

T r an s C on fgi uar toi n I nc orre ct

503 504

BR

Rear Wiper Park Switch

YL

R ear Wiper Motor Front Washer

G796 G797 G798

YL BU PU

WH

Rear W asher

G848

GN

MSS Green LED nI dicator  

508

PU

R a dio Left Speaker (+)

G943

BU

Broom Attachment Present

509

W H

R a dio Lef tS tS p ea e kr ((- )

G 9 81

P U

St a b lii e z rLe gin UP UP pos tioi n

I nv al di D ow ns hi tf S wi ct h

511

BR

T r an s S o len o i d 1 Op en C i c r ui t

512

G N

T r an s S o len o di 1 S h or t t o Gor u n d

513

OR

A/C C ompressor C ul tch

H767

BR

AWS Mode -C -Circle Steer -()

515

G Y

H VAC Bl Blow er Hi g h Speed

H 7 68

B R

R e a rS et er Lef tS tSol e noi d( )-

516

G N

H VAC Bl Blow er Med Speed

H 7 69

BR

R e a rS et er Ri Rig h t So elno di (- )

517

BU

HVAC Blow e r Low Speed

H770

BR

Shutoff Solenoid -()

T r an s S o len o i d 1 Sh or t t o B a t t er y T r an s S o len o i d 2 Op en C i c r ui t T r an s S o len o di 2 S h or t t o Gor u n d

0 64 2

T r an s S o len o i d 2 Sh or t t o B a t t er y

0 64 3

T r an s S o len o i d 3 Op en C i c r ui t

0 64 3

T r an s S o len o di 3 S h or t t o Gor u n d

0 64 3

T r an s S o len o i d 3 Sh or t t o B a t t er y

0 64 4

T r an s S o len o i d 4 Op en C i c r ui t

0 64 4

T r an s S o len o di 4 S h or t t o Gor u n d

0 64 4

T r an s S o len o i d 4 Sh or t t o B a t t er y

0 64 5

T r an s S o len o i d 5 Op en C i c r ui t

0 64 5

T r an s S o len o di 5 S h or t t o Gor u n d

0 64 5

T r an s S o len o i d 5 Sh or t t o B a t t er y

0 64 6

T r an s S o len o i d 6 Op en C i c r ui t

0 64 6

52 49

32

87

82

48

95 46

91 41

56

85 17 62

81

3

97 13

D

2 19

25

10

18 29

80

20

36

22

24 8

93 4

11

53 12

64 15 83 47 38 89 30 1 63 84 42 C 60 B  A 57

86 7

45 96 6

26

5

90

R a dio Ri Righ tS tSp e ake r( +)

H 7 30

B R

T ar ns m is is o n Thi dr Gear Sol

R adio Ri Righ tS tSpe a ke r( )-

H 7 31

G Y

T ar ns m is sion Fi srt / Sec o nd Gear So Sol

520

WH

A/C Switch ot Fuse

5 21

YL

AC / R ef ir ge ar nt P e r s ur e Sw ti ch

522

WH

5 37

GN

55 2

A/C Thermostat T ur nS gi na S l wi ct ht ht o F l as he rM rM o d ul e

Harness and Wire Symbols

Volume 1 of 2:

Function

Actuate

6 T2- 6 6 5

E ng i n e C o ol a n t T e mp er aut r e

7W-1238

EngineOilPressure

7X-8549

Hyd.FilterPressure

1 14 5 - 33 3

R ef ri ge a r nt P e r ss ur e

119-9631

Thermostat

H809

YL

H 83 3

PU

A ux De De e t n t - Co Co n t F ol wS wS w ot EC M

L998

OR

Q CA CAt a t chm e nt Au Aux .H .H d y .S .Sol e noi d( RT )

L 99 9

GN

QCA ta t ch me n tAu x . Hy d. So So el n o di (L (L T)

PK

MSS ot Main Relay Coil Return

M733

569

PK

Tachometer Low Speed

M913

PU

578

BU

Aux. Washer

58 5

YL

1 28 5 - 09 1

A ll W he el S e t er P e r ss ur e

131-9203

(196°F MIN) 6 2. 1 to 9 5 . 1 kP a

Loader Cylinder Pressure

AWS nI dicator  

(16 to 20 psi) 275to1750kPa

M968

BU

Coupler Pins Active

Qui ck Cou p le rP nis Di Di e sn g age

M96 9

Y L

C o u p ler Pi Pins In Ina tcvie

Qui k c Co Cou p ler Pi Pins En g age

N 9 04

P U

T ar ns m is is o n Fw dH dH gih Sol

Beacon Lights

N905

OR

Transmission Fw Fwd Lo Low Sol

8 6. 2 to 1 0 3 .4 k Pa (12. 5 to 15 p si)

1

--

(40 to 255 psi)

1 2

Deutschconnector: Typicalrepresen tation tation of a Deutsch connector. The plug contains all socketsandthereceptaclecontainsallpins.

1 2

Sure-Sealconnector: Typicalrepresenta tion tion of a Sure-Sealconnect or. The plug andreceptacle contain both pins and sockets.

Open

Normally

Open

4. 2 ± 1 .4°C

Normally

(39.5 ±2 ±2.5°F )

Closed

344 ±2 ±20 kPa

(80 psi)

2

SPDT

(50 ±3 ±3 psi) 3 00 0± 1 5 0 kP kP a ( 43 5 . 1 ±2 ±2 1 .8p s )i

Failure Mode Identifiers (FMI)1

Open Normally

-0.6 ±1 ±1.4°C

( 50 7 .6p s )i

PilotHydraulicPressure

Normally

Normally Closed

SPDT

FMI No No .

Datavalidbutab o venormalop oveno e rati erati onalra n ge. nge. Datavalidbutbe l ownormalop lownor m aloperationa l range lrange .

2

Dataerratic r atic , interm ,interm itten t ,orincorrect t,orincor r ect.

3

Voltageabovenormalorshortedhigh.

4

Voltagebelownormalorsh m alorshortedlow.

5

Currentbel e ntbelownorm aloropencircuit.

6

Currentabo e ntabo v enormalorgrounde venorm d circuit. dcircu

7

47 to 53°C

37 to 43°C

Normally

8

(117 to 127°F)

(99 to 109°F)

Open

9

2200 kPa Max

1800 ±1 ±175 kPa

Normally

(319.1 psi)

(261.1 ±2 ±25.4 psi)

Closed

1 Withincreasingpressur etheclosedconditioncanbemaintainedupto2800kPa(405psi), withdecreasingpressu retheclosedconditioncanbemaintaineddown retheclosedconditioncanbemaintaineddown to170kPa(25psi).

Mech a nic anic a lsystemnotres alsyst p ond pond i ngpro ingpro p erl perl y. Abno r malfreque rmalfr e que n cy,pulsewid ncy,pu t h,orperi th,orperi od. A bn om r a l up da t e.

10

A bn om r a l ar t e of c h an ge .

11

Failuremodenotide n tifi ntifi able.

12

B ad d e vi c e o r c o mp on e n t.

13

O u t of c ailb ar toi n .

14

P ar a me t e r f a li ur e s.

15

P ar a me t e r f a li ur e s.

16

Para m eternotavailabl mete e.

T r an s S o len o di 6 S h or t t o Gor u n d

58 6

T r an s S o len o i d 6 Sh or t t o B a t t er y

603

PK

H ar ne ss C od e Un kn ow n

604

OR

Brake Lights

N907

GN

Transmission Rev Sol

0 66 8

S hi tf L ev er N ot R es po nd ni g

605

YL

Left Turn Light

N945

OR

AWD Relay to AWD Sw

0 66 8

I nv al di S hi tf L ev er I np ut

606

GY

Right Turn Light

N997

GN

Electric MP Prop. Command P ( WM)

19

0 68 3

I n- Ge ar R el ay O pe n Ci c r ui t

607

PK

Front Std Flood Lights

R912

OR

Pilot Hydraulics Lock

20

0 68 3

I nG - ea r R eal y S ho r t o t G r ou nd

1 TheFMIis

0 68 3

I nG - ea r R eal y S ho r t o t B atte yr

59

ShiftHandleControl(MID2 No.117) 0 16 8 0 16 8 0 66 8

46

B atte yr V otla ge B eol w N or m a l

95

S hfit L ev er B a d De vci e o r Co m p o ne n t

3

MachineSecurityControl(MID2 No.124) B at e t yr Vo Vo tl ag e

02 48

C at D at aL aL ni kE r o r 

0254

ECM

08 17

B ac ku pB at e t yr

1 39 2

M SS O ut pu t Dr vi er # 1 M SS O ut pu t Dr vi er # 2

AuxiliaryHydraulicControl(MID2 No.106) 1 18 0

A u ixlai r y Hy d ar ul i c So l e n oi d # 1

1 18 1

A u ixlai r y Hy d ar ul i c So l e n oi d # 2

1 18 4

A u ixlai r y Hy d ar ul i c So l e n oi d S u pp l y

1 18 7

C on ti nu ou s Fl ow S wi ct h

1 18 9 1 52 9 1 53 0 1 TheCIDis 2 TheMIDis

A u ixlai r y Pr o p o riton a l Le ve r S wi t ch Q ui ck C ou pl er S wi tc h Q ui ck C ou pl er S ol en oi d adiagnosticcodethatindicateswhichcomponen tisfaulty. tisfaulty.

adiagnosticcodethatindicateswhichelectroniccontrolmodu le le diagnose dthefault. dthefault.

608

GN

Rear Std Flood L ights

T901

YL

MSS Antenna Signal

610

OR

Headlamp Sw to Dimmer Sw

T902

PK

MSS Antenna Return

6 11

PK

H i gh B e a m H e ad al m p s

harnessconnec tor. tor.

17

Modulenotrespondin g. g.

18

S en s o r s u pp yl f a ul t . Con d iito n n o t m et . P ar a me t e r f a li ur e s. adiagnosticcodethatindicateswhattypeoffailurehasoccurred.

64

B atte yr V otla ge A b o v e N or m a l

01 68

1 39 1

2

47 41

2 Contactpositionatthecontactsofthe

Fa li ur eDesc rip it on

0 1

0 64 6

1

9X-1123

57  A 29 63

81

91

87 15 17 80 60

4

30 32

82 62

96

Senderand Solenoid Specifications

10 86

53

85 B

56 42 83

Part No.

25 13

20 C

84 93

D 24

38

18 19

89 52 49

3E-1908

12

36

11 6

Component Description

Resistance (Ohms)1 17.6 ± 0.6

Title

SENR5841

105-2813

SENR5841

10.5

ElectricStartingMotor:

143-0539

SENR3828

90

171-8775

Solenoid: Pilot Hyd. Shutoff

10.5

 AutoshiftControl:

RENR2869

175-3070

Sender: Co Coolant Temp

 AuxHydraulicControl:

RENR3588

Sender: Co Converter Temp

48

110°C(230°F)-72to 82

54°C(130°F)-560to 716 110°C(230°F)-72to 82

Sender:FuelLevel 187-8936

Machine Harness Connector and Component Locations

Full: Empty:

1

Atroomtemperatureunlessotherwisenoted.

240 - 260 27.5 - 39.5

Alternator:

Form Number  105-2812

Optional(90A):

Solenoid: Front Drive

4W-9972 26

54°C(130°F)-560to 716

Related Electrical Service Manuals

121-4036

5 45

Solenoid: A/C Clutch

97

7

22

Component Part Number 

Wire Gauge Wire Color 

Printed in U.S.A.

0 65 0

8

5A Fuse (5 Amps)

Harnessidentificationcode: Thisexample indicates wire group 325, wire 135 in harness "AG".

Contact Position

--

35 0 0k Pa Ma Ma x

ColdStartTemperature

194-2553

(9 o t 1 3.8 psi)

1 10 3 . t o 13 8 kP a

Stabilizer Timer L( Term)

173-7527

93°C MIN

(225 ± 5°F)

(9 ot 13.8 psi)

551 kPa Max

ParkB ar keAl A larm

Deactuate

107.2 ± 2 . 8°C

6 2. 1 to 9 5 . 1 kP a

Side S hift Lock Solenoid

Fr o nt Dr Dri e v Sol e noi d

PartNumber: for Connector Receptacle

Receptacle Pin orSocket Number 

Off Machine Switch Specification Part No.

H yd ar ul ci Sh Sh u t of f So el no di

T he m r a l Fu Fu se t oH VA C M oo t r

Harness ConnectorSerialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness(C1, C2, C3, ...).

© 2012 Caterpillar   AllRights Reserved

BR

BR

L-C12 3E-5179

1

325-AG135 PK-14

YL

GN

L-C12 3E-5179

2

H771

W H

HarnessIdentificationLetter(s): (A, B, C, ..., AA, AB, AC, ...)

 AG-C4 111-7898

Plug

H 77 2

5 55

Wi re, Cable, b le, or Harness AssemblyIdentification: Includes HarnessIdentification Letters and Harness Connector Serialization Codes (see sample).

Part Number: for Connector Plug

(31 ±2 ±2. 5°F)

568

BR

442D: BRG1-UP BRY1-UP

Rear Steer Right Relay -()

0 64 1

0 64 2

438D: BPE1-UP BPN1-UP

Rear Steer Left Relay -()

PU

507

0 62 1

0 64 1

432D: BLD1-UP

MagneticLatchSolenoid: Amagnetic latch solenoid isan electricalcomponent that is activated byelectricityand held latched by a permanent magnet. Ithastwo coils (latch and unlatch) that make electromagnet when current flowsthrough them. It also hasan internal switch that places the latch coilcircuit open at the time the coil latches.

AWS Mode -R -Rear Steer (-)

506

0 64 1

0 64 2

430D: BNK1-5899 BML1-4800

Solenoid: Asolenoid isan electricalc omponent thatisactivated byelectricity. It hasa coilthat makesan electromagnet when current flowsthrough it. The electromagnet can open or close a valve or move a piece of metal that can do work.

S hu t of f R eal y ( +)

E 5-

Switch - W ater S eparator

R i de C o n t r ol R e al y S h o r to t G r ou nd

Relay (Magnetic Switch): Arelayis an electricalcomponent hat t isactivated byelectricity. It hasa coilthat makes an electromagnet when current flowsthrough it. The electromagnet can open or close the switch part of the relay.

Shutoff Relay (-)

S wit ch - Tra n sm si is o n Ne u t ar i l e zr

8

0 34 6

428D: BNB1-UP BLL1-UP BNS1-UP BMT1-UP

MSS Red L ED nI dicator  

7

0 34 6

0 36 8

GN OR

424D: BGP1-UP BKR1-UP

ECM nI Gear Output

10

0 34 6 0 36 7

G74 2 G743

PU

D-2

Motor - St arter

0 36 8

AccessoryCircuits

BR

C-15

Motor -R -Rear Washer Pump Motor - Rear Wiper

H-6

Switch - Start Aid

10

C -10

Motor - HVAC Blower

F846

420D: BKC1-919 BMC1-1059 BLN1-10299 FDP1-18399

Ride Control M anual Mode

Horn - Rear

Motor -F -Front Washer Pump

F765

416D: BKG1-3499 BGJ1-1049 BFP1-12899 CXP1-939

R i de C o n t r ol E n a bleS ign al

Ground - Right Cab 1

WH

Sender: Acomponent that isused with a temperature or pressur e gauge. The sender  measuresthe temperature or pressure. Its resistance changesto give an indication to the gauge of the temperature or pressure.

T

BroomAngleTiltRight

Ground - Right Cab 2

F748

Reed Switch: Aswitch whose contactsare controlled bya magnet. Amagnet closesthe contactsof a normallyopen reed switch; it opensthe contacts of a normallyclosed reed switch.

416D, 420D, 424D, 428D, 430D, 432D, 438D, and 442D Backhoe Loaders Electrical System

Broom A ngle Relay nI terlock

OR

 A346  A347

MonitoringCircuits

Ground (Case): Thisindicates that the component doesnot have a wire connected to ground. It isgrounded bybeing fastened to the machine.

Quick Coupler Diverter Valve AW DS DS wit ch Ju m per  

307

A

Ground(Wired): Thisindicates that the component is connected to a grounded wire. The grounded wire isfastened to the machine.

ControlCircuits

202

MonitoringCircuits

Switch (Normally Closed): Aswitch that willopen at a specified point (temp, press, etc.). No circle indicatesthat the wire cannot be disconnected from the component.

HVAC Blower Speed Jumper  

200

D A

AWD Power

CircuitBreaker  Symbol

Flow Symbol

Switch (Normally Open): Aswitch that willclose at a s pecified point (temp, press, etc.). The circle indicatesthat the component hasscrew terminalsand a wire can be disconnected from it.

HVAC Blower Run

D-7

Level Symbol

Fuse: Acomponent in an electrical circuit that willopen the circuit if too much current flows through it.

License Harness -R -Rear Turn Lamp

Fuse -Atch Rear Flood

Temperature Symbol

Symbols and Definitions

Rear Attachment Flood Lights

Fuse -All W heel S teer

A-6

T

Pressure Symbol

Left T ail Light

Fuse -Atch F ront F lood

Meter - Service

B atte yr V otla ge A b o v e N or m a l

614

License Lamp

F-4

Mot or - Air Sus p en is o n Se a t

Component AutoshiftTransmissionControl(MID 2 No.81)

PK

Batt ery

E 6-

Symbols

Description Lighting Circuits

613

Batt ery

Ground - Frame

CID

Wire Wire Number  Color 

 ArcSuppressor-AllWheelDrive

G au ge - T ac ho me te r wi h t AC / S hu o t f

0 16 8

Description PowerCircuits

 ArcSuppressor-HVAC

Gauge - Voltmeter

ComponentIdentifiers(CID)1 and Module Identifier 

Component

Harness And Wire Electrical Schematic Symbols

RENR3587-04 May 2012

WireDescription

Machine Location

I-14

Component

Schematic Machine Location Location

Wire Wire Number  Color 

Schematic Location

 Alarm-Backup

MachineSecuri ty:

RENR2462

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