Blacktop Project - Body Harness

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4AGE 20V Blacktop

Diary of Swap
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85/6 4AGE -> 4AGZE

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Air Intake Filter
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Oil Pan Gasket
Oxygen Sensor
Radiator Removal
Starter
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Throttle Body Cleaning
TPS Adjustment
Water Pump

Brakes

87+ Brake Upgrade
Caliper Rebuild-Front
Caliper Rebuild-Rear
Dust Shield Removal
Parking Brake Cable
SS Braided Brake Line

Suspension

Ball Joint Replacement
Bushings Install - Front
Bushings Install - Rear
Steering Knuckle Removal
Struts/Springs - Front
Struts/Springs - Rear
Sway Bar End Links

Body & Miscellaneous

87+ Antenna Replacement
Clear Turn Signals - Front
Clear Turn Signals - Rear
Door Hinges
Interior Door Triangles
Interior Headliner Painting
Interior Trim & Light Lens
Power Window Regulator
Rekeying Trunk Lock
Rust PM - Battery Bracket
Rust PM - Front Wheel Wells
Seats - MK3
Seats - Aftermarket
Shift Boot
SideMarker Mod
Sunroof Rattle
Wiper Switch

MR2 Meets

2006 Austin
2005 Austin
2005 Topeka NA2005
2004 Galveston
2004 Chattanooga SE2004
2003 Galveston
2002 Austin

Other Stuff

Suspension Setup Pics
My MR2 Diary
Latest Pics of My MR2

20V 'Blacktop' Project - Body Harness

Steering Column Connectors

Ignition Switch	NC	W	Blu/R	Blu/Y
	NC	Blk/W	Blk/R	R
	*To JB1 Blk6
Ignition Switch	GCG Pin #8 W/Blk	JB2 W13 Pin #7 Blu/Blk	-	-
Ignition Switch	NC	NC	-	-
Ignition Light for Key	GCW4 Pin #10 Blu/Y	JB1 1W12 Pin #10 Blu	-	-

SW Wipers	NC	Wiper Motor Blu/R	Wiper Motor Blu/Blk	NC	NC	NC	NC	MH Blk Pin #10 W/Blk	NC
SW Wipers	NC	JB1 W9 Pin #3 Blu	Wiper Motor Blu/W	NC	NC	NC	NC	JB2 EH Pin #1 (WW Pump) Blu/Y	NC
SW Lights	JB2 W13 Pin #1 R/W	JB2 EH Pin #7 R/Y	NC	NC	NC	JB2 W13 Pin #10 G/Blk		JB2 W13 Pin #4 G/W	JB2 W13 Pin #12 G/Y
SW Lights	MH Blk W/Blk	JB2 W13 Pin #7 R/G	NC	JB2 Relay A R/Blu	NC	JB2 W13 Pin #2 R/W	JB1 W9 Pin #6 LG	MH Blk W/Blk	JB2 EH Pin #5 G/R

Junction Block #1

JB1 Blk	NC					Rear Defog Pin #6 Blk
JB1 Blk	Rear Defog Pin #4 Blu/R	BH Blue in #13 Blk	Gauge Blue Pin #11 Blk	BH Blk Pin #11 Blk/W	NC	To Rear Fuel Pump Blk

JB1 1W12

GCW5 Pin #19

Grey

NC

GCW5 Pin #22

Blu/Y

JB2 W13 Pin #6

Blu/Blk

NC

NC

GCW4 Pin #8

W/Blk

To Rear Fuel Pump

R/W

GCW5 Pin #5

R/Blu

Key Light

Blu

G

JB2 W13 Pin #12

R/W

Ignition Switch	Blk/Y			W
	R	Blk/R	Blu/R	Blk/W

JB1 3W12	JB1 MW12 Pin #5 G/W				Gauge Br Pin #13 Blk/O
	NC	NC	JB2 W13 Pin #13 W/Blk	Cig Lighter Grey	NC
	NC	NC	NC	NC	Hazard Pin #10 G/O

JB1 FW12 (female side of MW12)	NC				BH D Pin #14 Purp*
	JB2 Flasher G/R	NC	JB2 Relay A G/W	JB2 EH Pin #6 W	NC
	BH D Pin #18 W/R	Blu	LG	Blu/R	G/R
	* NC on Socket side Red: To JB3 LDoor

JB1 MW12

(male side of MW12)

NC

NC

Hazard

G/R

NC

JB1 3W12 Pin #1

G/W

Hazard

W

NC

Gauge Blu Pin #10

W/R

Power Mirrors

Blu

Power Mirrors

LG

JB Blk #11

Blu/R

JB Blk #8

G/R

JB1 W10	Brake Sw Pin #2 R/W	NC			NC	JB2 Relay B R/Blu
JB1 W10	BH D Blk/W	NC	JB2 Relay B W/R	Power Mirrors W/Blu	JB3 W9 Pin #6 R/Blu	NC

JB1 W9	NC	NC				SW Wipers Pin #11 Blu
JB1 W9	NC	SW Lights Pin #15 LG	JB2 W13 Pin #9 G	Wiper Motor Pin #6 Blu	JB2 Relay A G	JB2 W13 Pin #6 Blu

Junction Block #2

Chassis Grounds

Jumper to JB3 Chassis Gnd

W/Blk

JB2 BW11 Pin #2

W/Blk

JB2 BW11	NC	Chassis Gnd W/Blk				NC	NC
JB2 BW11	NC	NC	NC	NC	JB2 Circuit Opening Relay Blu/Blk	NC	JB2 ABS Pin #2 G/W

JB2 BW13	SW Lights R/W	SW Lights R/W	JB2 Flasher W/Blk				SW Lights Pin #7 G/W	JB2 Flasher G/W
JB2 BW13	JB1 W9 Pin #9 Blu	SW Lights R/G	Brake Sw Pin #1 G/W	JB1 W9 Pin #6 G	SW Lights Pin #6 G/Blk	Left Sidemarker G/Blk	SW Lights Pin #8 G/Y	JB1 3W12 Pin #5 W/Blk

JB2 ABS (female)	ABS Comp Pin #4 W/R	ABS Comp Pin #8 G/W	NC	NC	NC	NC
JB2 ABS (male)	BH D Pin #18 W/R	JB2 W11 Pin #11 G/W	NC	NC	NC	NC

To RF Side Mirror

NC

W/Blk

Blu/Y

R/W

NC

JB2 W13	NC	Gauge Blu Pin #1 R/G	GCW5 Pin #16 R/G				NC	Gauge W Pin #6 R/W
JB2 W13	JB1 1W12 Pin #4 Blu/Blk	IG Sw4 Pin #2 Blu/Blk	NC	BH Blu Pin #14 R/Blk	GCG Pin #11 Blu/Y	NC	JB1 1W12 Pin #12 R/W	JB1 3W12 Pin #5 W/Blk

JB2 W9	Hazard Pin #9 G/W	Gauge W Pin #16 G/Blk				Hazard Pin #5 G/Blk
JB2 W9	Hazard Pin #2 G	NC	NC	NC	Hazard Pin #6 G/Y	Gauge Blu Pin #2 G/Y

To Rear	G/Y	G				To Fuel Pump 'FP' Blu/Blk	R/Blk
To Rear	G/Blk	NC	G/W	NC	Blu/Y	NC	R

To Rear	Brown				R/W
	Y	NC	NC	W	R
	Y/R	NC	Blk	Y	Blk

RDoor

(To Right Door Windows & Locks)

NC

NC

NC

MH Blk

Blk

JB3 LDoor

G/R

JB3 LDoor

Blu/W

Chassis Gnd

W/Blk

NC

Power Mirrors

Blu/Y

Power Mirrors

Blu/W

MH Blk

Blu

MH Blk

R

RDoor

(To Right Door Windows & Locks)

NC*

JB Blk

Brown/R

Power Mirrors

R/G

Power Mirrors

R

NC

JB Blk

G/R

JB Blk

Blu/R

Radio Pin #1

RF Speaker

Blu

Radio Pin #5

RF Speaker

LG

NC

*W/Blk on Socket, to GCG Pin #20

JB2 Relays

JB2 Relay A	JB2 EH Pin #12 R
	JB1 W9 Pin #8 G	SW Lights R/Blu
	JB1 FW12 Pin #5 G/W

JB2 Relay B	MH Blk Blk
	JB1 W10 W/R
	JB1 W10 R/Blu	NC	MH Blk W/Blk

JB2 Circuit Opening Relay	BH D 'FC' G/R
	BH D & JB2 BW11 Pin #9 'FP' Blu/Blk	BH D '+B' Blk/R
	BH D '+B' Blk/R

JB2 Flasher	JB2 W13 Pin #3 W/Blk	JB1 FW12 Pin #3 G/R
	JB2 W13 Pin #5 G/W

Junction Block #3

Grounds

JB3 Gnd Pin #1

W/Blk

To JB2 Chassis Gnd

W/Blk

Passenger Door Controls

(JB2 LDoor)

MH Blk Pin #2

Blk

NC

MH W Pin #1

Brown/R

NC

JB2 RDoor Pin #5

Blu/W

MH W Pin #5

Purp

MH W Pin #6

Pink

JB1 FW12

G/R

JB1 FW12

Blu/R

NC

JB2 RDoor Pin #6

G/R

MH Blk Pin #4

Blu

MH Blk Pin #8

R

JB1 FW12

LG

JB1 FW12

Blu

NC

JB3 W2

NC

BH D

W

JB3 W9	MH W Pin #3 Blu/O	NC		NC	MH W Pin #4 Blu/Blk
JB3 W9	NC	JB1 W10 Pin #9 R/Blu	Blower Blk	BH D Pin #12 Blu/R	JB2 EH Pin #10 Blu/R

JB3 GND	Chassis Ground W/Blk	AC Resistor W/Blk			LF Sidemarker W/Blk	NC
JB3 GND	NC	NC	Wiper Motor Pin #1 W/Blk	NC	AC Computer Pin #5 W/Blk	NC

ABS Controller	G/W	W/Blk	Purp	JB2 ABS Pin #1 W/R	NC	NC
ABS Controller	Brown	JB2 ABS Pin #2 G/W	W/Blk	NC	NC	NC

LF ABS Wheel Sensor

JB2 ABS EH Socket

G

JB2 ABS EH Socket

R

Brake Switch	JB2 W13 Pin #8 G/W	JB1 W10 Pin #1 R/W
	NC	NC

Mid-Harness Connectors

MH Blk	AC Temp Sensor LG/Blk	NC	NC	JB2 RDoor Socket R	NC	JB2 RDoor Socket Blu
MH Blk	SW Lights W/Blk	JB2 Relay B W/Blk	SW Lights W/Blk	NC	NC	NC
MH Blk (Mirror of above)	Power Mirrors Blu	JB3 LDoor Blu	R	JB3 LDoor R	BH D LG/Blk	AC Controller LG/Blk
	JB2 Relay B Blk	JB3 LDoor Blk	JB2 RDoor Socket Blk	SW Wipers Pin #8 W/Blk	JB2 W13 Pin #13 W/Blk	NC
	Pins of same color are shorted together

JB Blk	JB2 RDoor Brown/R	MH W Pin #2 Brown/R	Power Mirrors Brown/R			Fan Speed Pin #6 W/Blk	Heater Controls Pin #7 W/Blk
	Power Mirrors Blu/R	JB2 RDoor Blu/R	JB1 MW12 Pin #8 Blu/R	Power Mirrors G/R	JB2 RDoor G/R	JB1 MW12 Pin #9 G/R	Chassis Ground W/Blk
	Pins of same color are shorted together

Grey Connector Box

GCW4

Radio Pin #4

Blu/Y

Cig Lighter Pin #2

G

NC

Power Mirrors

Grey

NC

Servo Pin #2

R/Blu

NC

JB1 1W12 Pin #7

W/Blk

Servo Pin #1

W/Blk

Key Light Pin #1

Blu/Y

Radio Pin #10

G

Light Pin #1

G

Radio Pin #3

Grey

Cig Lighter

W/Blk

Light Pin #2

W/Blk

Parking Brake

R/G

NC

NC

Cig Lighter

W/Blk

Gauge Blue Pin #3 GND

W/Blk

GCG

Gauge W Pin #7 (Door Ajar)

Blu/Y

Gauge Brown Pin #7

G

NC

NC

Defog Pin #3

W/Blk

BH Blk Pin #12

R/Blu

NC

Ig SW Pin #1

W/Blk

Power Mirrors

W/Blk

NC

JB2 W13b Pin #10 (Dome Light)

Blu/Y

NC

BH W Pin #10 'ELS3'

G

NC

GCW5 Pin #13

W/Blk

Chassis Ground

W/Blk

Gauge Brown Pin #9 'Brake Light'

R/G

Gauge Blu Pin #9 'ABS'

R/Blu

NC

JB2 RDoor Pin #1

W/Blk

NC

NC

GCW5

NC

NC

Dash Clock

W/Blk

NC

JB1 1W12 Pin #9

R/Blu

Parking Brake

W/Blk

Dash Clock

Grey

Dash Clock

G

Rear Defog Pin #1

G

Dash Clock

Glu/Y

NC

NC

GCG Pin #15

W/Blk

Servo2 Pin #3

R/Blu

Heater Controls Pin #1

R/Blu

JB2 W13b Pin #3 'Brake Fluid Level'

R/G

Hazard Pin #3

W/Blk

Heater Controls Pin #19

W/Blk

JB1 1W12 Pin #1

Grey

JB1 1W12 Pin #11

G

Heater Controls Pin #8

G

JB1 1W12 Pin #3

Blu/Y

Gauge Cluster

W

Fuel Pump

Y

BH Blue Pin #2

W

Fuel Pump

Y/R

Chassis Ground

Brown

BH Blue Pin #7

R/W

JB2 W13 Pin #5

R/W

GCG Pin #1

Blu/Y

BH W Pin #11

Purp/W

NC

NC

NC

NC

BH Blue Pin #8

W/Blu

NC

NC

JB2 W9 Pin #2

G/Blk

Blue

JB2 W13 Pin #2

R/G

JB2 W9 Pin #9

G/Y

GCW4 Pin #20

W/Blk

NC

NC

NC

NC

BH Blk Pin #4

R/Y

GCG Pin #18

R/Blu

JB1 MW12 Pin #12

W/R

JB1 Blk Pin #5

Blk

NC

JB Blk Pin #2

Blk

Brown

BH Blu Pin #12

Y

NC

NC

NC

NC

NC

GCG Pin #2

G

Seat Belt

R

GCG Pin #17 (Brake)

R/G

BH Blu Pin #9

Y/G

BH Blu Pin #1

Brown

BH W Pin #14

R

JB1 3W12 Pin #2

Blk/O

Body-Engine Harness Connectors

BH A (Blue)	BH Blk Pin #11 R/Blu	NC			NC	NC
	Gauge W R/W	Gauge W W/Blu	Gauge Brown Pin #10 Y/G	NC	NC	Gauge Brown Pin #1 Y
	Gauge Brown Pin #11 Brown	Gauge W W	JB2 W13 Pin #9 R/Blk	JB1 Blk Pin #4 Blk	NC	NC

Red: To Speed Sensor

BH B (Black)	MH W Pin #7 Blk	Gauge Blu Pin #13 Blk	NC	Gauge Blu Pin #8 R/Y	NC	O2#2 Pin #1 LG
	NC	JB1 Blk Pin #6 Blk/W	NC	NC	BH Blue Pin #1 R/Blue	GCG Pin #6 R/Blu

BH C	Gauge Br Pin #12 R	O2#2 Pin #2 Brown					NC
	NC	NC	NC	GCG Pin#13 G	Gauge W Pin #8 Purp/W	NC	NC
	NC	NC	NC	NC	NC	NC	NC

BH D	JB1 W10 Pin #5 Blk/W	AC Comp W/Blu			MH Blk LG/Blk	JB1W10 Blk/W
	JB2 EH Socket Blu	AC Comp Y/Blk	JB3 W2 Pin #2 W		AC Comp & MH W Blu/W	NC
	JB2 Relay C G/R	JB3 W9 Pin #8 Blu/R			NC	JB2 Relay C Blu/Blk
	JB1 W12 PIn #2 & JB2 ABS Socket Purp	JB2 Relay C Blk/R	AC Comp Y/R	AC Comp R/Blu	JB1 W12 PIn #8 & JB2 ABS Pin #1 W/R	JB2 ABS Socket Y/G

Hazard Switch	NC	JB2W9 Pin #4 G			GCW5 Pin #17 W/Blk	NC
Hazard Switch	JB2 W9 Pin #3 G/Blk	JB2 W9 Pin #8 G/Y	JB1 MW12 Pin #4 G/R	JB1 MW12 Pin #7 W	JB2 W9 Pin #1 G/W	JB1 3W12 Pin #12 G/O

In Dash Clock

GCW5

Blu/Y

GCW5

W/Blk

GCW5

G

GCW5

Grey

Rear Defog Switch	GCW5 Pin #9 G			NC
	GCG Pin #5 W/Blk	JB1 Blk Pin #3 Blu/R	NC	JB1 Blk Pin #2 Blk

Radio	JB2 Rdoor Pin #8 (RF Speaker) LG	MH 'W' Pin #3 (LF Speaker) Pink			GCW4 Pin #13 Grey	GCW4 Pin #1 Blu/R
Radio	JB2 Rdoor Pin #8 (RF Speaker) Blu	MH 'W' Pin #3 (LF Speaker) Purp	Chassis Ground Brown	Antenna Pink/Blu	NC	GCW4 Pin #11 G

Radio

(Rear Speakers)

R

Blk

W

NC

NC

Y

Radio Antenna

Radio Pin #8

Pink/Blu

Grounds

Radio

Brown

Brown

Jumper to other Chassis Grounds

Brown

Jumper to other Chassis Grounds

Brown

O2 Sensor after Cat.

BH Blk Pin #6

LG

BH W Pin #16

Brown

Wiper Motor

JB3 Gnd Pin #7

W/Blk

SW Wipers Pin #2

Blu/R

SW Wipers Pin #3

Blu/Blk

NC

SW Wipers Pin #12

Blu/W

JB1 W9 Pin #7

Blu

Mid Harness Connector

(female)

Fan Speed

R

JB Blk Pin #2

Brown/R

Radio Pin #2 (LF Speaker)

Pink

Radio Pin #6 (LF Speaker)

Purple

Fan Speed

Blu/Blk

Fan Speed

Blu/O

Bh Blk Pin #1

Blk

Heater Controls

Blu/W

Heater Controls

Blu/Blk

Fan Speed

Blk/W

Heater Controls

G/W

Heater Controls

Y

Mid Harness Connector

(male)

JB3 Ldoor

Brown/R

AC Resistor

R

JB3 Gnd Pin #1

Blu/O

JB3 Gnd Pin #4

Blu/Blk

JB3 Ldoor

Purp

JB3 Ldoor

Pink

AC Computer

Y

AC Computer

G/W

Blower & AC Resistor

Blk/W

AC Resistor

Blu/Blk

AC Computer & BH D

Blue/W

AC Computer

Blk

Heater Controls

Fan Speed	MH W Pin #1 R	MH W Pin #5 Blu/Blk		NC	NC	MH W Pin #6 Blu/O
	JB Blk Pin #4 W/Blk		NC	MH W Pin #10 Blk/W

Rest

GCW5 Pin #15

R/Blu

Servo 2 Pin #1

G/Y

Servo 2 Pin #2

Blu/W

NC

MH W

G/W

MH W

Y

MH W

Blu/W

JB Blk Pin #5

W/Blk

GCW5 Pin #21

G

NC

NC

NC

NC

Servo 1 Pin #4

R/Blk

Servo 1 Pin #5

G

Servo 1 Pin #6

Blu/Y

Servo 1 Pin #7

Blu/O

Servo 1 Pin #8

Y/Blk

MH W

Blu/Blk

GCW5 Pin #18

W/Blk

Servo 2

(pass side)

Heater Controls Pin #2

G/Y

Heater Controls Pin #3

Blu/W

GCW5 Pin #14

R/Blu

Servo 1	GCW4 Pin #9 W/Blk					GCW4 Pin #6 R/Blu
Servo 1	NC	Heater Controls Y/Blk	Heater Controls Blu/O	Heater Controls Blu/Y	Heater Controls LG	Heater Controls R/Blk

Heater Blower Power	JB3 Blk
	MH W Pin #10 Blk/W

AC Evaporator Temp Sensor	NC	NC
	MH Blk LG/Blk	AC Computer Blk/Blu

AC Power Resistor	JB3 Gnd Pin #2 W/Blk	MH W Pin #10 Blu/Blk
	MH W Pin #2 R	MH W Pin #9 Blk/W

AC Computer	BH D Y/R	BH D Y/Blk	MH W Blu/W			MH W Blk	JB3 Gnd Pin #9 W/Blk
AC Computer	BH D R/Blu	MH W Y	AC Temp Sensor Blk/Blu	MH W G/Y	BH D W/Blu	EH Blu/Blk	MH Blk LG/Blk

Cigarette Lighter	JB1 3W12 Pin #6 Grey
		GCW4 Pin #19 W/Blk
	GCW4 Pin #14 W/Blk	GCW4 Pin #2 G
Console Light	GCW4 Pin #12 G	GCW4 Pin #15 W/Blk

Grounds	GCG Pin #16 W/Blk	JB Blk Pin #12 W/Blk	-
Grounds	To other Chassis Grounds Brown	To other Chassis Grounds Brown	Gauge W Pin #4 Brown

LF Sidemarker

JB2 W13 Pin #11

G/Blk

JB3 Gnd Pin #3

W/Blk

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Thanks for Visiting! - Eric Southers

Disclaimer: This web page in no way replaces the MR2 repair manual. Follow what it says before me. The purpose of this page is to give you a better pictorial description of what to do. I cannot be held responsible for any mishaps caused by this web page.