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4AGE 20V Blacktop

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Diary of Swap
Wiring
Transmission
Exhaust
Cooling System
Miscellaneous
Dyno

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85/6 4AGE -> 4AGZE

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Wiring

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Air Intake Filter
Alternator
Clutch Slave Cylinder
Clutch Master Cylinder
Coolant Flush
Distributor O-Rings
Exhaust Manifold
Fuel Filter
Fuel Pump Cut-off Switch
Ignition Timing
Oil Cooler Hoses
Oil Filter Adapter O-Rings
Oil Pan Gasket
Oxygen Sensor
Radiator Removal
Starter
Thermostat
Throttle Body Cleaning
TPS Adjustment
Water Pump

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

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

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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

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

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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

-
-
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
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

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

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

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

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
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

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

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

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
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

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
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
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

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

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

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

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

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.