SK28520.FM

ECM FUSE(20 AMP)

ER)

ER

AIRHEATER

ELEMENT

A

457-8 , BLKWHT/LT-GRN

180, WHT

239

, W

HT

239-10 , WHT

A495, WHT

B23

9,

WH

T

243, WHT

570, WHT HOOD HARNESS

CITY HORN

HSHP PURPLE

HSFOA/C PRESSURE

SWITCH

X

X

ALLIWORLD

A

REMOTE PTOSWITCH EOF(OPTIONAL)

STARTERMAG SWITCH

OPENS AT350 PSIPRESSURE SWITCH

PRESSURE SWITCH

OPENS ATATMOSPERIC PRESSURE

ALL AR

243, WHT

570, WHT

A495, WHT

180, WHT

B239, WHT

A30-1 , WHT

A29-1 , WHT

29-1 , WHT

OVERCRANKPROTECTION

MANUALXMSN

NEUTRALSTART

SWITCH

MD/HD AUTOXMSN NEUTRALSTART RELAY

OR

OR

ENGINE FANSOLENOID

ALTERNATOR

-

+

J60 ABP60 B A

S15

P18

A

BB

J18

A

T8-11

T7-11

1T9

1T8

T9-11

1T7

1T6 T6-1

1 87A

8685

3087

P16

A

BB

J16

A

STARTER

-

+S

SET

RESUME

(-)(+)BATTERY

P14-3

2

1

P14-1

2

1

87A

8685

3087

1

P9

4

6

2

5

3

P15

A

BB

J15

A

P14-2

2

11

J14

2

CAT 28520 B 01

567

, R

ED

/GR

N

457-

1,

BLK

417-

1,

PR

P

418-

3,

WH

T

466

, W

HT

/RE

D

465

, G

RN

419

, LT

-GR

N43

8,

BR

N/W

HT

668

, LT

-GR

N19

7-1

, B

LU/R

ED

239-

4,

BLK

462

, Y

EL

476

, G

RN

/RE

D

463

, P

INK

464

, W

HT

569

, LT

-GR

N/P

INK

455-

4,

RE

D45

5-5

, R

ED

568

, LT

-GR

N/B

LU

544

, G

RN

/WH

T

461

, B

LU

584

, G

RN

/WH

T

667

, W

HT

458

, B

LU

E1, WHT

658

, W

HT

/LT

-GR

N

239-2 , BLK

239-

1,

BLK

239-5 , BLK

239-6 , BLK

577-1 , BLK

577-

3,

BLA

577-

4,

BLK

29, PRP

83, ORN/WHT

93, LT_GRN/WHT

289

, LT

-BLU

/GR

N

457-

2,

BLK

457-4 , BLK

239-7 , BLK

615, TAN/GRN

59, VIO

616, BLK/ORN

639, LT-GRN

582

, R

ED

/OR

N

12, RED

START(POS

STARTER(NEG)

START(SOL)

31, RED

AIRHEATER

CB(135 AMP)

LOWCOOLANT

PROBE

J1587DATALINK

MANUAL XMSN

R HEATERLAY FUSE

10 AMP)

ENGINE SPARE E1

457-5 , BLK

418-

1,

WH

T

418-2 , WHT

417-

3,

PR

P

417-2 , PRP

242-4 , RED

SHUTDOWN

ATER TEMPLIGHT

380, PRP/YEL

285, GRN/BRN

231, GRN

232, GRN

ENGINE ECMCONNECTOR

522-1 ,

522-

2,

WH

T/L

T-G

RN

242-3 , RED

242-2 , RED

242-

1,

RE

D

A29, PRP

A30, BLK/ORN

A23

-1,

OR

N/G

RN

455-2 , RED

242-5 , RED

29-1 , WHT

A29-1 , WHTA30-1 , WHT

239-11 , WHT

RED

INLET AIRHEATER RELAY

+5

VD

C

+ 8

VD

CS

EN

SO

R C

OM

MO

N

J158

7 D

AT

A L

INK

PO

SIT

IVE

J158

7 D

AT

A L

INK

NE

GA

TIV

E

EX

HA

US

T B

RA

KE

EN

GIN

E F

AN

SO

LEN

OID

CLU

TC

H S

WIT

CH

CH

EC

K E

NG

INE

LA

MP

ST

OP

EN

GIN

E L

AM

P

FA

ST

IDLE

LA

MP

VE

HIC

LE S

PE

ED

INP

UT

(+)

VE

HIC

LE S

PE

ED

INP

UT

(-)

SE

T S

WIT

CH

FA

ST

IDLE

EN

AB

LEE

NG

FA

N O

VE

RR

IDE

RE

SU

ME

SW

ITC

HS

ER

VIC

E B

RA

KE

#1

CO

OLA

NT

LE

VE

L N

OR

MA

L

UN

SW

ITC

HE

D +

BA

TT

ER

Y P

OW

ER

UN

SW

ITC

HE

D +

BA

TT

ER

Y P

OW

ER

CO

OLA

NT

LE

VE

L LO

W

PT

O E

NA

BLE

CR

UIS

E C

ON

TR

OL

ON

/OF

F S

WIT

CH

NE

UT

RA

L IN

DIC

AT

ION

SE

RV

ICE

BR

AK

E #

2(-

) B

AT

TE

RY

PO

WE

RA

CC

ELE

RA

TO

R P

ED

AL

PO

SIT

ION

(-)

BA

TT

ER

Y P

OW

ER

HIG

H

OR

R

661

, Y

EL

662

, G

RN

660

, W

HT

J1939DATALINK(OPTIONAL)

ENGINE/FIREWALLWIRING

197, BLU/RED

197-

2,

BLU

/RE

D

974

, P

RP

973

, G

RN

VE

HIC

LE S

PE

ED

OU

TP

UT

(+

)V

EH

ICLE

SP

EE

D O

UT

PU

T (

-)

239-4 , BLK

569, LT-GRN/PINK567, RED/GRN

465, GRN

584, GRN/WHT

289, LT-BLU/GRN

639, LT-GRN

458

, B

LU58

2,

RE

D/O

RN

466

, W

HT

/RE

D66

8,

LT-G

RN

462

, Y

EL

667

, W

HT

419

, LT

-GR

N46

1,

BLU

463

, P

INK

464

, W

HT

973

, G

RN

522-

2,

WH

T/L

T-G

RN

522-

1,

WH

T/L

T-G

RN

974

, P

RP

544

, G

RN

/WH

T

A23

-1,

OR

N/G

RN

438

, B

RN

/WH

T

476

, G

RN

/RE

D

232

, G

RN

59,

VIO

231

, G

RN

285

, G

RN

/BR

N

380

, P

RP

/YE

L

29,

PR

P

E1,

W

HT

93,

LT_G

RN

/WH

T

84-1 , GRN/WHT83, LT_GRN

OR

TO XMSN

WT157, TAN

12, RED

239-7 , BLK

615, TAN/GRN

31, RED

616, BLK/ORN

A29, PRPA30, BLK/ORN

658, WHT/LT-GRN

661, YEL662, GRN660, WHT

568, LT-GRN/BLU

SE

NS

OR

CO

MM

ON

RE

MO

TE

PT

O "

SE

T"

RE

MO

TE

PT

O "

RE

SU

ME

"

LOW

SH

IELD

J193

9 D

AT

A L

INK

FOR OPTIONALL/N 4860200A ALT

A45

7,

WH

TA

462,

W

HT

A46

3,

WH

T

A463, WHTA462, WHTA457, WHT

SEE SHEET 2 FOR CAB HARNESS

IGN

ITIO

N K

EY

SW

ITC

H

239-1 , BLK

83,

OR

N/W

HT

239-8 , BLK BLK

WHT

239-

9,

BLK

ENGINE BLOCKGROUND STUD

4A4B4C4D4E4F4G5A5B5C5D5E5F5G6C6DP38 6E7A7B7C7E7F7G8F8G

1 2 57 4 5 6 7 8 9 10 11 12 13 14 15 16P41

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 69 35 36 37 38 39 40 41 68 43 44 45 46 47 48 49 70 51 52 53 54 55 56 3 58 59 60 61 62 63 64 65 66 67 42 34 50

B

J54

A A

B

P54

P12

1 1

J12

P5A

1 1

J5

T69

1 1

T69.

T70

1 1

T70.

P68

1 1

J68

P61

B

A A

J61

B

1

J52

P67

1 1

J67

1

J71

J59

B

A A

B

P59

P1.17345628910111213141516171819202122232425262728293031

S10

J46-1

A

B

C

J22-2

B

A

C

J22-1

B

A

A

B

P42

B

J42

A

J63

BA

P63

A

B

A

B

C

P22

J53

AB B

A

P53

D

J55

C

B

A A

B

C

D

P55

A

J46-2

B

B

A

P46

S4

S3

S22

S1

S6

S9

87A

8685

3087

J56

A

BB

A

P56

J57

B

AA

B

P57

J19

A

BB

A

P19

T64-1

11

T64

T60-1

11

T60

T65-1

11

T65

P66

11

J66

S7

J51

A

BB

A

P51

P43C

1

J43C

1

P44-1

11

J44

1

J62 P62

1

1

J45 P45

1

P43A

11

J43A

1

J43B P43B

1

J35

11

P35

P71

ABC

1

J34 P34.

1

J72

CBA

P72

ABC

6E SK

EXHAUSTBRAKE

XMSNTEMP

AIRE

(

INLETIR HEATER

RELAY

WATER TEMPSENSOR

W

SOLENOID(OPTIONAL)

ROADSPEED

SENSORMANUAL MSN ONLY

( MANUAL MSN ONLY)

CLUTCHSWITCH

ROADSPEED

SIGNALSON MD/HD TRANSMISSION

/C COMPRESSOSOLENOID

55

AU

ISON HD/MDUTO XMSNANGE INDRELAY

87A

8685

3087

87A

8685

3087

312

SK28520.FM

29-10 , PRP

380-1 , PRP/YEL

PRESSURESWITCHES

SPEEDOMETER HARNESS

CABGROUND

ENGINESPARE "E1"

20A

SWITCHEDPOWER

A/CCOMPRESSOR

CLUTCH

INLET AIRHEATER

LAMP

WATERTEMP

LAMP"

STARTSWITCH

WATERTEMPGAUGE

XMSNTEMPGAUGE

231-1 , GRN

242-20 , RED

93-1 , LT_GRN/WHT

E1-1 , WHT

59-1 , VIO

83-1 , ORN/WHT

286, .

239-20 , BLK

522-13 , WHT/LT_GRN

522-12 , WHTBULKHEAD

CONNECTOR(ROUND)

457-3

FANINTERLOCK

(JUMPER)

#1 SERVICE BRAKEN.C. PRESSURE

SWITCH

DETAIL "A"(FOR INSTALLATIONS WITHOUT AIR CONDITIONING

AND MANUAL OVERRIDE SWITCH)

1 P39

ENGINE FAN SWITCH

J9

11

P17

1 1

J17

1 T3-2

1 T2-2

1 P33

654321

P34

J26

4321

P26

1234

J23

6543211

23456

P23

R

+12VDC

+12VDC

+12VDC

A

286

CAT 28520 B 02

BULKHEADCONNECTOR

(ROUND)

BULKHEADCONNECTOR

(RECTANGULAR)

A23

, W

HT

242

, R

ED 24

2-10

, R

ED

220

, W

HT

242-

11,

RE

D

242-

12,

GR

N/W

HT

242-13 , RED

242-14 , RED

354

, R

ED

/BLU

417

, P

RP

417-

10,

WH

T

417-

11,

PR

P

418

, W

HT

418-

11,

WH

T

418-

10,

WH

T

419-

1,

WH

T

438-

1,

WH

T

457

, W

HT

457-

11,

WH

T

457-

12,

BLK45

7-13

, W

HT

457-14 , WHT

457-

15,

BLK

457-

16,

BLK

458-1 , WHT

461-

1,

WH

T

462-

1,

WH

T

463-

1,

WH

T46

4-1

, W

HT

466-

1,

WH

T

476-

1,

WH

T

522

, W

HT

522-10 , WHT/LT_GRN

522-11 , WHT

542

, LT

_GR

N

544-

1,

WH

T

544-

2,

GR

N/W

HT

582-1 , WHT

667-

1,

WH

T

668-

1,

WH

T

242-

20,

RE

D

29-1

1,

PR

P

29-1

3,

PR

P

289-

1,

LT_B

LU/G

RN

232-

1,

GR

N

232-

3,

GR

N

232-

2,

GR

N

231-

1,

GR

N23

9-20

, B

LK

E1-

1,

WH

T

59-1

, V

IO

CHECKENGINE

LAMP

CRUISE ON/OFFSWITCH

CAB HARNESS CAB FEEDTHROUGH

REMOTE PTOSWITCH (OPTIONAL)

457-17 , WHT

DIAGNOSTICCONNECTOR

SHUTDOWNOVERIDE

SHUTDOWN

FANINTERLOCK

EXHAUSTBRAKE ON/OFF

DASHSWITCH

289A

-1,

LT-B

LU/G

RN

289-

11,

LT-B

LU/G

RN

FASTIDLELAMP

REMOTE PTOLAMP

#1 SERVICE BRAKE NC PRESSURE SWITCH

#2 SERVICE BRAKE NO PRESSURE SWITCH

STOPENGINE

LAMP

THROTTLE SENSOR

SWITCHED+12 VDC

CRUISESET/RESUME SWITCH

PTOINTERLOCK

FAST IDLE SWITCH (OPTIONAL)

J1587DATALINK

MD/HD WORLD XMSNENGINE BRAKE ENABLECIRCUIT

ABSRELAY

"

220-1 , WHT

CAB WIRING

(FU

TU

RE

US

E)

(FU

TU

RE

US

E)

463-

1,

WH

T

462-

1,

WH

T

461-

1,

WH

T

476-

1,

WH

T

285-1 , GRN/BRN

544-

2,

GR

N/W

HT

544-1 , WHT

A23

, W

HT

522, WHT

458-

1,

WH

T58

2-1

, W

HT

522-

11,

WH

T

93-1

, LT

_GR

N/W

HT

380-

1,

PR

P/Y

EL

289-

1,

LT_B

LU/G

RN

285-

1,

GR

N/B

RN

668-1 , WHT

542, LT_GRN

464-1 , WHT

667-1 , WHT

354, RED/BLU

438-1 , WHT419-1 , WHT

CRUISELAMP

"ENGINEFAN

LAMP"

83-1

, O

RN

/WH

T

A11, .B11, .

ABSHARNESSWT119, .

ALLISON MD/HDWORLD XMSN

ENGINE BRAKE RELAY

SEE DETAIL "A"

SEE DETAIL "A"(FOR INSTALLATIONS WITHOUT AIR

CONDITIONING AND MANUAL OVERRIDESWITCH)

P44

1

J41

1

8GJ38 8F 7G7F 7E 7C 7B 7A 6E 6D 6C 5G5F 5E 5D 5C 5B 5A 4G4F 4E 4D 4C 4B 4A

SET

RESUME

1

J10

JA

1

PA

1 G

ENGINE FAN SWITCH

1P8.J8

1

BA

P1

P6 4 5 2 3 11J6 3254

P7. 6 5 4 3 2 11J7 23456

P3 5 4 3 2 11J3 2345ABCDEFP5

P2. 5 4 3 2 11J2 2345

S14

S13

S12

S11

1

J4P4.

1

J30 11P30

AT4-1

1 1T4

POWERSIGNALRETURN

RED

BLK

WHT

R

A

+12VDC

S14_c0

G

P13

2

1 1

J13

2

P11

1 1

J11

J7-1BCA A

CBP7

T2-1

1T21

T1-2

1 1T1

J8.

1 1P8

T3-1

1T31

A

+12VDC

P731J73

1

IGNITIONSWITCH

J4. 11P4

31J1 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 2 6 5 4 3 7 1

87A

8685

3087

87A

8685

3087

WT119

654321 P37

1

J44.

S21

1

J41.

J21

11

P21

654321P29

S19

P22.

1 1

J22

S18

JB

1

PB

1

6E SK

312