Tutorial: Obd1 Main Harness Conversion For 86 Hatch
Okay as some of you may know im working on dropping in a b16b into a 86 hatch Si. I decided to convert my main harness from OBD0 to OBD1. That means i went and pulled out a EG main harness. I got the whole thing. I couldnt find any 5 speed coupe civics at the salvage yard so i pulled one from a 5 speed 94 civic LX sedan. Finding a coupe could have save me from having all the wires for ABS and power windows and locks. this is my first wiring project ever, im totally new to this. i know that i jumped in the deep part of the pool, so i need some clarification and help so i can finish this project. and i hope that with your help this is going to be a tutorial for other people that wish to do the same to their 86's.
Parts list:
EG main wire harness( if you like things simple in your car go with a coupe harness with no power windows,power locks, ABS, Cruise control)
EG combination switch( for trouble shooting purposes, but not necessary)
sections of 3rd gen civic wire harness such as: headlights, tail lights, rear defrosters, rear wiper, front wiper motor, fuel pump,
so far i think i got the ignition switch figured out. here is what i got:
Ignition Switch
86 Hatch Harness : OBD1 EG harness
6 wire : 5 wire
Bl/Y(IG1) :to: Bl/Y
Bl/W (ST):to: Bl/W
Bl/Y (IG2):to: Y
W(BAT) \
> :to: W ??? is this right?
W (BAT) /
W/R(ACC) :to: W/Bl
2 wire : 2 wire
W/Bu :to: W/Bu
Bu/W :to: W/Bu from UD Fuse box
Headlight switch
86 Hatch Harness : OBD1 EG harness
8 wire connector : 5 wire connector : 3 wire connector
G/Bu------(L turn)-------------------------:to:----------------G/Bu (L turn)
G/Y--------(R turn)-------------------------:to:----------------G/Y (R turn)
R/Bu (High) :to: R/Bu (High)
R/W (Low) :to: R/W (Low)
W (BAT0) :to: W
G/R (Relay OUT)-- ------------------------------------------G/O (DIR, Hazard relay)
R/Bl (Side)?????
R/G (BAT1) :to: W
-----------------------R/G
Front wiper and washer switch
86 Hatch Harness : OBD1 EG harness
11 wire connector : 5 wire connector: 7 wire connector
Y ( IG2)--------------------------------------------------- Bl/G (front washer motor)
W/G (BAT2)-------------------------------------------------- Bu/G (interm/park control)
G/W (Relay IN)----------------------------------------------- Bl (Ground K)
Bu ?? ---------------------------------------------- G/Bl
Bl ??------------------------------------------------------- Y/Bu (interm wiper control)
G/Bl (IG1)------------------------------------------------- Bu/Y (front wiper motor)
Bu/R (Horn)-------------------------------------------------------Bu (front wiper motor)
Bu/W (COM)
G/Bl (W1)
Bu/Y (HI)
G (INT)
--------------------------------G/Bl (IG3)
--------------------------------G/Bl ??
--------------------------------G (L)
--------------------------------Lg/Bl (S)
--------------------------------B (E)
[u]Rear Taillights, front headlights
86 Hatch Harness : OBD1 EG harness
Right TL
5 wire connector: 4 wire connector
G/Y()---------------------G/W
Bl()-----------------------G/Y
G/W()--------------------R/Bl
R/Bl ()--------------------B
G/Bl ()
Left TL
5 wire connector: 4 wire connector
G/Bu()---------------------G/W
Bl()-------------------------G/Bu
G/W()----------------------R/Bu
R/Bl ()----------------------B
G/Bl ()
Left Headlight
3 wire connector: 3 wire connector
R/G----------------------G/Bu
R/Y----------------------Bl
Bl------------------------R/Bl
Right Headlight
3 wire connector: 3 wire connector
R/Bu----------------------G/Y
R/Y----------------------Bl
Bl------------------------R/Bl
Left turn signal
3 wire connector:
G/W
R/Bl
Bl
Right front turn signal 3 wire connector:
G/R
R/Bl
Bl
-------------------------------------------------------------------------------------------------------------------------------
Color Codes:
Bl =Black
Bu =Blue
Br =Brown
Y = Yellow
G =Green
R =Red
W =White
O =Orange
Lb =Light Blue
Lg =Light Green
P =Pink
Gr =Gray
Contributors: Yurhomieblaze
Parts list:
EG main wire harness( if you like things simple in your car go with a coupe harness with no power windows,power locks, ABS, Cruise control)
EG combination switch( for trouble shooting purposes, but not necessary)
sections of 3rd gen civic wire harness such as: headlights, tail lights, rear defrosters, rear wiper, front wiper motor, fuel pump,
so far i think i got the ignition switch figured out. here is what i got:
Ignition Switch
86 Hatch Harness : OBD1 EG harness
6 wire : 5 wire
Bl/Y(IG1) :to: Bl/Y
Bl/W (ST):to: Bl/W
Bl/Y (IG2):to: Y
W(BAT) \
> :to: W ??? is this right?
W (BAT) /
W/R(ACC) :to: W/Bl
2 wire : 2 wire
W/Bu :to: W/Bu
Bu/W :to: W/Bu from UD Fuse box
Headlight switch
86 Hatch Harness : OBD1 EG harness
8 wire connector : 5 wire connector : 3 wire connector
G/Bu------(L turn)-------------------------:to:----------------G/Bu (L turn)
G/Y--------(R turn)-------------------------:to:----------------G/Y (R turn)
R/Bu (High) :to: R/Bu (High)
R/W (Low) :to: R/W (Low)
W (BAT0) :to: W
G/R (Relay OUT)-- ------------------------------------------G/O (DIR, Hazard relay)
R/Bl (Side)?????
R/G (BAT1) :to: W
-----------------------R/G
Front wiper and washer switch
86 Hatch Harness : OBD1 EG harness
11 wire connector : 5 wire connector: 7 wire connector
Y ( IG2)--------------------------------------------------- Bl/G (front washer motor)
W/G (BAT2)-------------------------------------------------- Bu/G (interm/park control)
G/W (Relay IN)----------------------------------------------- Bl (Ground K)
Bu ?? ---------------------------------------------- G/Bl
Bl ??------------------------------------------------------- Y/Bu (interm wiper control)
G/Bl (IG1)------------------------------------------------- Bu/Y (front wiper motor)
Bu/R (Horn)-------------------------------------------------------Bu (front wiper motor)
Bu/W (COM)
G/Bl (W1)
Bu/Y (HI)
G (INT)
--------------------------------G/Bl (IG3)
--------------------------------G/Bl ??
--------------------------------G (L)
--------------------------------Lg/Bl (S)
--------------------------------B (E)
[u]Rear Taillights, front headlights
86 Hatch Harness : OBD1 EG harness
Right TL
5 wire connector: 4 wire connector
G/Y()---------------------G/W
Bl()-----------------------G/Y
G/W()--------------------R/Bl
R/Bl ()--------------------B
G/Bl ()
Left TL
5 wire connector: 4 wire connector
G/Bu()---------------------G/W
Bl()-------------------------G/Bu
G/W()----------------------R/Bu
R/Bl ()----------------------B
G/Bl ()
Left Headlight
3 wire connector: 3 wire connector
R/G----------------------G/Bu
R/Y----------------------Bl
Bl------------------------R/Bl
Right Headlight
3 wire connector: 3 wire connector
R/Bu----------------------G/Y
R/Y----------------------Bl
Bl------------------------R/Bl
Left turn signal
3 wire connector:
G/W
R/Bl
Bl
Right front turn signal 3 wire connector:
G/R
R/Bl
Bl
-------------------------------------------------------------------------------------------------------------------------------
Color Codes:
Bl =Black
Bu =Blue
Br =Brown
Y = Yellow
G =Green
R =Red
W =White
O =Orange
Lb =Light Blue
Lg =Light Green
P =Pink
Gr =Gray
Contributors: Yurhomieblaze
Last edited by KCHC; Aug 11, 2012 at 12:54 PM.
Honda-Tech Member
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Joined: Oct 2005
Posts: 9,716
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From: 99 probs but a stolen car aint 1, ca, cerritos/fullerton
I would love to help you on this cause this what i do all day too. But this is way to tech to try to walk you thru this. Honda has a couple of harness that use different colors wires on the same year car.
Thank you for replying to my thread. i've done some more work on it.
Honda-Tech Member
iTrader: (1)
Joined: Oct 2005
Posts: 9,716
Likes: 3
From: 99 probs but a stolen car aint 1, ca, cerritos/fullerton
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