Download - 66 MUSTANG CIRCUIT DIAGRAM (W/ PREMIUM FUSE BOX AND … Mustang Wiring Diagrams (Colorized).pdf · Gauge Feed Wiring Main Disconnect Ignition switch Stop Light switch Tail light harness,

CONDENSER

CONDENSER

1873

6 2 45

15

36

2

4

8765

4321

654321

I A S F

DIMMERSPARESPARE

HEATERACCACC

LTR/HAZDOM LMP

SPARESPARESPARE

85

86

3087a

87

85

86

3087a

87

TURN SIGNAL &PARKING LIGHT

13

Note:Connect 16to 16A ifTach isremoved.

21

37

44

44

2

39

16

39

460

21

32

655655

429628

54

57

37

57

19

19

140

262

19

655

32

19

19

2

53

9

654

26

63

35

37

654

655

904

32

57

57

57648

16

22

490

490

19

FOG LIGHT SWITCH

53

25

482

5

16

54

53

9

145

140

50

460

53

54

3029

30

30

10

19

30

34

31

3030

19

482

3

482

482

482

482

9

9

49

14

2

30

10319

19

40

39

16A

297

19 140

54

54

5354

54

140

29

14

145

14

14

44

12

11

13

2

11

12

112

1213

13

1213

3

34

2

31

904

31

2

3

12

32

2953

10

1914

15

11

53

42

9528

96763

Colorization by:www.clanmcmuffin.com/Mustang.html

rev 8/11/2018

LIGHTS

54

FIREWALL

8

904

16A

LOWBEAM

WINDSHIELDWIPERMOTOR

LOWBEAM

HIGHBEAM

HIGHBEAM

LEFT COURTESYLIGHT

WINDSHIELDWIPER SWCONNECTORS

LIGHTSWITCH

GAS GAUGE(DASH UNIT)

INSTR LIGHT

L DIRECTIONINDICATOR

OIL PRESSUREGAUGE

CONSTANTVOLTAGEREGULATOR

INSTR LIGHT

HIGH BEAMINDICATOR

TRANS SEL INDHORN BUTTON

TURN SIGNALSWITCH

EMERGENCYWARNINGFLASHER& SWITCH

AMMETER

INSTRUMENT LT

R DIRECTIONINDICATOR

INSTR LIGHT

TEMPERATUREGAUGE

IGNITIONSWITCH

CIGARLIGHTER

ASH TRAY LT

HEATERSWITCH

HEATER LIGHT

R COURTESYLIGHT

R FRONTDOOR SW

HEATERRESISTOR

TAILLIGHT-STOP &TURN SIGNAL

R BACKUPLIGHT

LUGGAGECOMP LIGHT

LICENSEPLATELIGHT

GAS GAUGE(TANK UNIT)

L BACKUPLIGHT

TAILLIGHT -STOP &TURN SIGNAL

L FRONTDOOR SWBEAM SELECTOR SW

DIRECTIONALSIGNAL

PARKINGLIGHT

HORN

HORN

BATTERY

STARTERRELAY

STARTER

ALTERNATOR

COIL

BREAKERDISTRIBUTOR

TEMP GAUGE(ENG UNIT)

BREAKERDISTRIBUTOR

OIL PRESSSWITCH

ALTERNATORREGULATOR HEATER

BLOWERMOTOR

NEUTRALSAFETYSWITCH

BACKUPLIGHTSWITCH

STOPLIGHT

SWITCH

FUSEBLOCK

DOMELIGHT

6 CYL

8 CYL

19 54

37

19

I0A

15

12

140

181

152152

37

152

3232

297

39

31

16

262

19490

913

TACHOMETERCLOCK

RALLY PACK FOG LIGHTCKT BREAKER

47737

FOG LIGHT

FOG LIGHT

648

478

478

37478

11

913

22

3

11

913

913181

181

TURNSIGNAL

FLASHER

66 MUSTANG CIRCUIT DIAGRAM (W/ PREMIUM FUSE BOX AND RELAYS)IF YOU FIND ANY ERRORS OR OMISSIONS, PLEASE CONTACT ME AT [email protected]

46019

10

37

30

INSTRUMENT HARNESS

3053

15

15

39 40

39

3715

35

MAIN DISCONNECT (GAUGE FEEDS)

TAILLIGHTHARNESS

FIREWALL

HEADLIGHT HARNESS

1919

19

181

844

3

MAIN DISCONNECT(HEADLIGHTS)

478478 14

13

50

1873

6 2 45

15

36

2

4

8765

4321

654321

I A S F

CONDENSER

CONDENSER

LEFT COURTESYLIGHT

WINDSHIELDWIPER SWCONNECTORS

LIGHTSWITCH

GAS GAUGE(DASH UNIT)

INSTR LIGHT

L DIRECTIONINDICATOR

OIL PRESSUREGAUGE

CONSTANTVOLTAGEREGULATOR

INSTR LIGHT

HIGH BEAMINDICATOR

TRANS SEL INDHORN BUTTON

TURN SIGNALSWITCH

EMERGENCYWARNINGFLASHER& SWITCH

INSTRUMENT LT

AMMETER

R DIRECTIONINDICATOR

INSTR LIGHT

TEMPERATUREGAUGE

IGNITIONSWITCH

CIGARLIGHTER

ASH TRAY LT

HEATERSWITCH

HEATER LIGHT

R COURTESYLIGHT

R FRONTDOOR SW

HEATERRESISTOR

TAILLIGHT-STOP &TURN SIGNAL

R BACKUPLIGHT

LUGGAGECOMP LIGHT

LICENSEPLATELIGHT

GAS GAUGE(TANK UNIT)

L BACKUPLIGHT

TAILLIGHT -STOP &TURN SIGNAL

L FRONTDOOR SWBEAM SELECTOR SW

LOWBEAM

HIGHBEAM

LOWBEAM

HIGHBEAM

DIRECTIONALSIGNAL

PARKINGLIGHT

HORN

HORN

TURN SIGNAL &PARKING LIGHT

BATTERY

STARTERRELAY

STARTER

ALTERNATOR

COIL

BREAKERDISTRIBUTOR

TEMP GAUGE(ENG UNIT)

BREAKERDISTRIBUTOR

OIL PRESSSWITCH

ALTERNATORREGULATOR HEATER

BLOWERMOTOR

NEUTRALSAFETYSWITCH

BACKUPLIGHTSWITCH

WINDSHIELDWIPER

MOTOR

STOPLIGHT

SWITCH

FUSEBLOCK

DOMELIGHT

6 CYL

8 CYL

19

181

54 29737

19

I0A

1512

13

140

181

152152

37

152

3232

297

39

31

16

262

19490

913

TACHOMETERCLOCK

RALLY PACKCKT BREAKER

477

37

FOG LIGHT

FOG LIGHT

478

648

478

478

37478

11

913

22

3

11

913

913

913

181

181

TURNSIGNALFLASHER

MAIN DISCONNECTS(TOP IS RIGHT AND BOTTOM LEFT)66 MUSTANG CIRCUIT DIAGRAM (CLASSIC)

IF YOU FIND ANY ERRORS OR OMISSIONS, PLEASE CONTACT ME AT [email protected]

460

19

54

53

9

145

140

50

460

53

54

3029

30

30

10

19

30

34

31

3030

19

482

3

482

482

482

482

9

482

9

49

14

2

5

30

8

10319

19

40

39

16A

297

19 140

21

54

54

5354

54

140

29

14

145

14

14

44

12

11

13

2

11

12

112

1213

13

1213

3

34

213

16A31

904 904

31

2

3

12

37

44

37

44

2

8

39

16

39

460

21

32

655655

429628

54

57

37

57

40

19

19

140

262

19

655

32

19

19

2

53

9

654

26

655

53

35

37

654

655

37

904

32

32

57

57

57648

16

22

Note:Connect 16to 16A ifTach isremoved.

490

490

19

2953

10

1914

152511

53

54

4295

2896

763

54

54

FOG LIGHT SWITCH

297

10

16

I0A

3344

Colorization by:www.clanmcmuffin.com/Mustang.html

rev 8/12/2018

21

359

359

359

359

358

358

358

54

54

54 54

22

53

53

53

53

54

54

53

54

5454

53

53

53

53

54

54

54

53

53

22 22

2

10

3

460

2

10

3

44

482

40140

25

21

181

37

19

19

450

450

450

450

450

450

520

520

181

913

913

181

37

37

262

262

16

16A

913

181

490

37

19

137

913

709

708

19

19

19

19

648

16A

648

19

57

57

57

57

57

575757

53

53

19

19

19

19

648

44

3

10

2

21

16

297

297

8

8

40

Note: Connect 16A to 16 if

you remove tachometer

16

25

19

57

57

490

490

Colorization bywww.clanmcmuffin.com/Mustang.html

57

57 12

13

2

11

37

37

11

2

482

3

12

13

11

11

482

11

3

13

12

57

57

57

12

13

12

15

13

10

10A

25

460

15

10

14

140

140

14

9

14

140

57

140

14

57

140

14

5

5

9

5

9

3

44

2

10

460

482

8

44

482

11

3

2

37

21

21

11

140140

297

50

49

34

34

37

12

3

57

13

14

BACKUP SWITCH


25

57 478

478

14

14

477

57

14

14


37

65

61

63

58

56

57

65

57

65

65

61

63

57

56

57

57

941

941

763

763

763

54

30

3025

21

19

19

37

1953

5425

53

53

53

54

54

53

53

53

53

53

53

57

57

763

95

96

28

4257

57

53

58

21

54

29

53

54

39

30

30

37

30

30

39

39

39

31

39

37

54

30

39

54

53

53

53

53

57

19

19

19

19

19

29

53

57234

297


234

57

57

37

54

53

297

297

32

32

32

32

32

654

655

16A

262

32

655

37

655

152

904

37

152

904

16

26

37

35

26

26

904

37

21

16

16

37

32


175 175

175

123

122

122

123

122

123

57


807

57

57

807

19

297

297

19

140

37

21

807

57

19

37

807

37

806

806

57

19

140

37

37

806

57

57

806

37

25


140

Headlight

dimmer switch

Turn signal

flasher

Headlight

harness Main

Disconnect

Turn signal

connector

Glove compartment

light

Heater

Hazard flasher

Hazard flasher

switch

Gauge Feed Wiring

Main Disconnect

Ignition

switch

Stop Light

switch

Tail light harness, Blk

to tail light, Blk/Red to

backup lights, Yel/Wht

to fuel sending unit.

Connect Red/Blu wire

to neutral switch (auto

transmission)

Instrument cluster

Light

Switch

One relay is for switched

fuse ckts, the other is for

headlights

Switched/fused Accessory (white)

Switched accessory. Conn to

radio, backup switch, seat belt

warning sw.

Org/Wht-Windshield

Wiper switch

Pink wire connect to red/grn

at ignition switch OR to black

wire on Rally Pack Tach.

Connect Red/Grn to

Pnk OR to Red wire on

Rally Pack Tach

Dash lights, tach & clock light,

radio light-fed from Light Sw

dimmer through fuse panel

Cigar

lighter

Blu/Red female

connects to Trans

Sel Indicator.

Left Front

door courtesy

light & switch

Right Front door

courtesy light &

switch

Blk/Blu to rear seat

Courtesy lights

Backup sw

(blk/red)

Grn/Yel to Console

compartment lgt

Blk/Blu to Console

Courtesy lgt

Right under dash

Courtesy light

Left under dash

Courtesy light

66 Mustang Harness with Premium Fuse Box & Relays www.clanmcmuffin.com/Mustang.html6/25/2018