Hey If I swap all my wiring in my car (90 CRX) to OBD-1 I would have to swap all the wiring underneath the dash too right? If I do that will all the gauges and dash stuff plug into OBD-1 or what do I have to do to use OBD-1. I have an engine wire harness already, but I still need the ECU harness.

 

no that would be unnecessary, you need a blown90hatch conversion harness for inside the car for the ecu. Then you would have to convert the dizzy plugs to obd1, you would also need obd1 injectors. Also would need a 4 wire o2. Seems like im forgetting something...


so basiclaly you have to convert your engine bay harness to obd1 clips so u can use the obd1 stuff. then a conversion harness for the ecu which run from anywhere from 125-170 bucks. I recommend this http://www.jkobdconversionharness.com/ comes with all the instructions unlike boomslang who just has the harness and no instructions. I have all the clips for obd1 if you are interested, its of a jdm gsr harness.

 

O ryou can go to the zcresource.com and check out the write up over there it is great and all you need is half the chassis harness off obd1.

 

So I would have to change the half of the harness that plugs to the engine right? Will the OBD1 engine harness plug up to the OBD0 plugs at the firewall though?

 

no...use your obd0 engine harness and use the obd1 dizzy plugs, injector clips, 4 wire o2 clip.

 

Unless you want to do it just from reading this go here http://thezcresource.com/index...rsion
Molex
Pin #
Engine
Wire
Color
Engine Wire Function

1
BLK
Ground

2
YEL/BLK
Junction C125

3
BLU/YEL
Electronic air control valve

4
YEL/RED
Oil pressure switch

5
RED
Purge control solenoid

6
BLU
Tachometer signal

7
BLK/YEL
Alternator

8
WHT/BLU
Alternator

9
YEL
Back-up switch

10
GRN/BLK
Back-up switch

11
YEL/GRN
Coolant temperature sender signal

12
GRN
Coolant temperature switch

13
YEL/BLU
Vehicle speed sensor (N/A but there for future use if needed)

14
YEL/WHT
Vehicle speed sensor (N/A but there for future use if needed)

15
N/A
N/A


Molex
Pin #
Harness
Wire
Color
Harness Wire Function

1
BLK
Ground C211 pin#5

2
BLK
Junction C125 (Run wire to pin#8 and 10 on Molex #1 side B)

3
BLK
Electronic air control valve (Run wire to pin #2 on the Molex #1 side B)

4
YEL/RED
Oil pressure switch C211 pin #6

5
BLK
Purge control solenoid (Run wire to pin #5 on the Molex #1 side B)

6
BLU
Tachometer signal C211 pin #8

7
BLK/YEL
Alternator C211 pin #1

8
WHT/BLU
Alternator C211 pin #2

9
YEL
Back-up switch C217 pin#3

10
GRN/BLK
Back-up switch C217 pin#6

11
YEL/GRN
Coolant temperature sender signal C211 pin#7

12
YEL/GRN
Coolant temperature switch C212 pin #5

13
N/A
N/A

14
N/A
N/A

15
N/A
N/A

 

I am runing DSM injectors now... Why do you have to switch to OBD1 injector plugs? Shouldnt the resistor box already be set to go throgh the OBD0 harness? I understand the Dizzy plug switch... The O2 sensor wires would have to be run seperate too right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by screamincivik &raquo;</TD></TR><TR><TD CLASS="quote">no...use your obd0 engine harness and use the obd1 dizzy plugs, injector clips, 4 wire o2 clip. </TD></TR></TABLE>

yup that about covers it

 

lol............................................... .................................................. ...not in cali

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by soundman &raquo;</TD></TR><TR><TD CLASS="quote">I am runing DSM injectors now... Why do you have to switch to OBD1 injector plugs? Shouldnt the resistor box already be set to go throgh the OBD0 harness? I understand the Dizzy plug switch... The O2 sensor wires would have to be run seperate too right?</TD></TR></TABLE>
you don't have to change your injectors or plugs. unless you want to run different injectors. if you leave your dsm injectors and resistor box alone you'll be good, no need to change them.

 

arrrrgg i need to do this pre obd-to-obd1 conversion on my crx cuz i got a 92 Ls motor goin in..... need to make it obd1 so i can take it to the ref and get it all clear there. just gotta get it done by next summer when it comes smog time... so i will be needing obd1 injector clips, dizzy plugs, and such obd1 conversion parts. werd!