need help with obd1 conv. harness (rywire) need wiring experts (i searched)
03-18-2006, 12:31 PM
#1
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need help with obd1 conv. harness (rywire) need wiring experts (i searched)
ok, im trying to do an obd-1 conversion for my '90 dx (which for some reason came w/ an 88 si interior harness) the motor is a d16z6 and i do have the 4-wire o2sensor and for my ecu i have a p28.
my wiring has been hacked to pieces (i've had a few friends try to help me with the conversion, before i ended up going with a rywire harness) so heres the problems i have encountered so far:
for the jumper harness (made by a friend, but checked by rywire)
1) on the obd-1 side of the jumper pin d-4 (brown) has a loose wire...what is it for?
2) on the ecu harness (3 plugs in the car that go to the ecu) i have 3 wires that are cut, they are a-8( red w/black) b-5 (white w/yellow) and c-8 (yellow w/red) .....what are those wires for?
3) the extra plug on the ecu jumper harness (wired in by rywire) has 2 loose wire's, 1 white wire and 1 gray wire....what are they for?
4) coming from the engine harness, there is a plug to connect to the extra plug on the ecu jumper.... it has 2 wires that are loose, they are: 1 orange and 1 blue...what do they go to?
5) on my interior harness (by the engine bay fuse panel next to the "power" plugs) there are 5 wires that have been cut and had wires of different color added to them (for length?) this is how the wires go:
blue w/ white ------> red w/black
green w/black -----> yellow w/white
(two wires are ran together)
blue w/yellow -----> light blue
blue ------> brown
(two wires are ran together)
black ------> black w/yellow
what could these wires go to?
6) theres a 4-pin connector (in the same loom as my map sensor wires(also cut))
-blue
-black w/ yellow
-green
-black
where do these wires go?
7) also on my fuel injector clips dont seem to fit on the fuel injectors, do i have to use obd-1 clips for obd-1 injectors? (right now the clear/yellow clips wont go on any of my fuel injectors)
8) can the IAT wires be extended without causing resistance problems? (it looks like the plug was ran to fit an iat on the side on the intake manifold....my iat is on the back of the mani)
9) what is the purge valve on the back of the z6 mani? (it's black and looks like it needs 2-wires) where do i get these wires from (meaning what part of the harness?? i dont have any left over plugs on my conversion harness)
i have been searching but cant seem to find the answers, and i know ryan(from rywire) is on the road (to the so-cal meet) not sure if peter is?
so if anyone has ideas on how to get the car running...let me know...thanks
my wiring has been hacked to pieces (i've had a few friends try to help me with the conversion, before i ended up going with a rywire harness) so heres the problems i have encountered so far:
for the jumper harness (made by a friend, but checked by rywire)
1) on the obd-1 side of the jumper pin d-4 (brown) has a loose wire...what is it for?
2) on the ecu harness (3 plugs in the car that go to the ecu) i have 3 wires that are cut, they are a-8( red w/black) b-5 (white w/yellow) and c-8 (yellow w/red) .....what are those wires for?
3) the extra plug on the ecu jumper harness (wired in by rywire) has 2 loose wire's, 1 white wire and 1 gray wire....what are they for?
4) coming from the engine harness, there is a plug to connect to the extra plug on the ecu jumper.... it has 2 wires that are loose, they are: 1 orange and 1 blue...what do they go to?
5) on my interior harness (by the engine bay fuse panel next to the "power" plugs) there are 5 wires that have been cut and had wires of different color added to them (for length?) this is how the wires go:
blue w/ white ------> red w/black
green w/black -----> yellow w/white
(two wires are ran together)
blue w/yellow -----> light blue
blue ------> brown
(two wires are ran together)
black ------> black w/yellow
what could these wires go to?
6) theres a 4-pin connector (in the same loom as my map sensor wires(also cut))
-blue
-black w/ yellow
-green
-black
where do these wires go?
7) also on my fuel injector clips dont seem to fit on the fuel injectors, do i have to use obd-1 clips for obd-1 injectors? (right now the clear/yellow clips wont go on any of my fuel injectors)
8) can the IAT wires be extended without causing resistance problems? (it looks like the plug was ran to fit an iat on the side on the intake manifold....my iat is on the back of the mani)
9) what is the purge valve on the back of the z6 mani? (it's black and looks like it needs 2-wires) where do i get these wires from (meaning what part of the harness?? i dont have any left over plugs on my conversion harness)
i have been searching but cant seem to find the answers, and i know ryan(from rywire) is on the road (to the so-cal meet) not sure if peter is?
so if anyone has ideas on how to get the car running...let me know...thanks
03-18-2006, 02:11 PM
#5
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Re: need help with obd1 conv. harness (doublethink)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by doublethink »</TD></TR><TR><TD CLASS="quote">take pictures please.</TD></TR></TABLE> im sorry i dont know how to post pics 
03-18-2006, 02:24 PM
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Re: need help with obd1 conv. harness (hatchinprogress)
injector clips should work I have no idea why they wouldn't and stay with your obd 0 injectors....does it have the injector resistor box installed?
extending the wires to the IAT will not hurt it so go for it
I think you can just take that purge valve black thing off of the mani or just leave it unhooked it will not throw a code....as for the rest of your stuff your harness seemed as bout as hacked as mine I am tryin to figure out lol wish I could help
extending the wires to the IAT will not hurt it so go for it
I think you can just take that purge valve black thing off of the mani or just leave it unhooked it will not throw a code....as for the rest of your stuff your harness seemed as bout as hacked as mine I am tryin to figure out lol wish I could help
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03-18-2006, 03:57 PM
#8
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Thread Starter
Re: need help with obd1 conv. harness (gnar kill)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gnar kill »</TD></TR><TR><TD CLASS="quote">injector clips should work I have no idea why they wouldn't and stay with your obd 0 injectors....does it have the injector resistor box installed?
extending the wires to the IAT will not hurt it so go for it
I think you can just take that purge valve black thing off of the mani or just leave it unhooked it will not throw a code....as for the rest of your stuff your harness seemed as bout as hacked as mine I am tryin to figure out lol wish I could help</TD></TR></TABLE>if i dont use the purge valve....can i still get the car reffed? (i wanna get the motor reffed thats the whole reason im doing the conversion) oh and the resistor box is gone (wiried for obd-1 injectors)<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pinecone »</TD></TR><TR><TD CLASS="quote">Sounds like the fun I am having with mine right now.</TD></TR></TABLE> im past the fun part....i bought the shell last may, quickly after installed the motor.....so i've been held up for about a year because of wiring
extending the wires to the IAT will not hurt it so go for it
I think you can just take that purge valve black thing off of the mani or just leave it unhooked it will not throw a code....as for the rest of your stuff your harness seemed as bout as hacked as mine I am tryin to figure out lol wish I could help</TD></TR></TABLE>if i dont use the purge valve....can i still get the car reffed? (i wanna get the motor reffed thats the whole reason im doing the conversion) oh and the resistor box is gone (wiried for obd-1 injectors)<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pinecone »</TD></TR><TR><TD CLASS="quote">Sounds like the fun I am having with mine right now.</TD></TR></TABLE> im past the fun part....i bought the shell last may, quickly after installed the motor.....so i've been held up for about a year because of wiring
03-18-2006, 07:13 PM
#11
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Re: (90_EF_Si)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90_EF_Si »</TD></TR><TR><TD CLASS="quote">buy a whole new wiring harness, thats what i did, avoid all the bullshit headaches and start fresh man. You will be better off in the long run and you'll have peace of mind.</TD></TR></TABLE> i've bought 3 already....bump for help
03-18-2006, 09:10 PM
#13
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Re: need help with obd1 conv. harness (hatchinprogress)
03-19-2006, 07:05 AM
#14
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Re: (d16efhatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d16efhatch »</TD></TR><TR><TD CLASS="quote">BUMP for some answer's.....someone help a ef homie out </TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fernruffryders »</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread?id=1476443</TD></TR></TABLE>thanks guys ..... now after seeing the link (from ruff ryder) im more stumped. if you view the link it shows an ecu pin out and according the diagram this is what my wires are:
-a8= v-tec sol.
-b5= v-tec pressure switch
-c8= 2nd o2 sensor
but if you click on the 2nd link (from dr.disco) it shows a conversion diagram (for a jumper harness) and this is waht it says about the same wires:
-a8= lock sol. ----> xxxx
-b5= alt. ------>xxxx
-c8= egr vls ---->>>>
-D04 - SCS --> B20 - SCS
so which diagram should i go by???? and if anyone can help w/ the other ?'s please do.....i wanna drive my car
</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fernruffryders »</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread?id=1476443</TD></TR></TABLE>thanks guys ..... now after seeing the link (from ruff ryder) im more stumped. if you view the link it shows an ecu pin out and according the diagram this is what my wires are:-a8= v-tec sol.
-b5= v-tec pressure switch
-c8= 2nd o2 sensor
but if you click on the 2nd link (from dr.disco) it shows a conversion diagram (for a jumper harness) and this is waht it says about the same wires:
-a8= lock sol. ----> xxxx
-b5= alt. ------>xxxx
-c8= egr vls ---->>>>
-D04 - SCS --> B20 - SCS
so which diagram should i go by???? and if anyone can help w/ the other ?'s please do.....i wanna drive my car
03-19-2006, 09:56 AM
#17
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Thread Starter
Re: (d16efhatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d16efhatch »</TD></TR><TR><TD CLASS="quote">BUMP for some more help for this guy!!!! </TD></TR></TABLE> what he said
</TD></TR></TABLE> what he said
03-19-2006, 03:04 PM
#20
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Thread Starter
Re: (d16efhatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d16efhatch »</TD></TR><TR><TD CLASS="quote">i like it when this thread goes BUMP BUMP BUMP....haha 
</TD></TR></TABLE> me too
</TD></TR></TABLE> me too
03-19-2006, 04:05 PM
#21
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awwwwwww mmannnnn
this is making my head hurt all over again
Took me 3 months to wire mine up. I still remember some ****, so I will look at all my papers and give you a answer by tuesday
FYI start all oer again with the wiring. I just scimmed thru what you typed, but use ur original engine wiring harness
all you need is the conversion harness and the rest will be cake when I'm done
this is making my head hurt all over again
Took me 3 months to wire mine up. I still remember some ****, so I will look at all my papers and give you a answer by tuesday
FYI start all oer again with the wiring. I just scimmed thru what you typed, but use ur original engine wiring harness
all you need is the conversion harness and the rest will be cake when I'm done
03-19-2006, 06:11 PM
#25
Honda-Tech Member
Re: need help with obd1 conv. harness (hatchinprogress)
See responses below in <FONT COLOR="red">red</FONT>
Originally Posted by hatchinprogress
ok, im trying to do an obd-1 conversion for my '90 dx (which for some reason came w/ an 88 si interior harness) the motor is a d16z6 and i do have the 4-wire o2sensor and for my ecu i have a p28.
my wiring has been hacked to pieces (i've had a few friends try to help me with the conversion, before i ended up going with a rywire harness) so heres the problems i have encountered so far:
for the jumper harness (made by a friend, but checked by rywire)
1) on the obd-1 side of the jumper pin d-4 (brown) has a loose wire...what is it for?
<FONT COLOR="red">Ground this wire when you want to check your ecu codes.</FONT>
2) on the ecu harness (3 plugs in the car that go to the ecu) i have 3 wires that are cut, they are a-8( red w/black) b-5 (white w/yellow) and c-8 (yellow w/red) .....what are those wires for?<FONT COLOR="red">Probably those wires were cut when the conversion from DX to SI was done. Those are the OBD0 vtec wires, etc. They need to be reconnected at the stock location on the OBD0 side. </FONT>
3) the extra plug on the ecu jumper harness (wired in by rywire) has 2 loose wire's, 1 white wire and 1 gray wire....what are they for?
<FONT COLOR="red">See #4</FONT>
4) coming from the engine harness, there is a plug to connect to the extra plug on the ecu jumper.... it has 2 wires that are loose, they are: 1 orange and 1 blue...what do they go to?
<FONT COLOR="red">These two wires are probably for the extra sensor on the distributor. CYP....cylinder position sensor that is not on the dx model.</FONT>
5) on my interior harness (by the engine bay fuse panel next to the "power" plugs) there are 5 wires that have been cut and had wires of different color added to them (for length?) this is how the wires go:
blue w/ white ------> red w/black
green w/black -----> yellow w/white
(two wires are ran together)
blue w/yellow -----> light blue
blue ------> brown
(two wires are ran together)
black ------> black w/yellow
what could these wires go to?
<FONT COLOR="red">Beats me but this is definately why I hate working on other peoples messes. Probably want to start over with a package from dx to mpfi OBD1 from rywire.
These are probably the vtec wires, etc. ran from the OBD1 side of the harness. Trace the wires back to the harness and tell me where they are coming from....OBd1 side.</FONT>
6) theres a 4-pin connector (in the same loom as my map sensor wires(also cut))
-blue
-black w/ yellow
-green
-black
where do these wires go?
<FONT COLOR="red">Possibly 4 Wire O2 sensor.</FONT>
7) also on my fuel injector clips dont seem to fit on the fuel injectors, do i have to use obd-1 clips for obd-1 injectors? (right now the clear/yellow clips wont go on any of my fuel injectors)
<FONT COLOR="red">There is a small block in the center of the injectors that you have to cut off.....X-acto knife works great. </FONT>
8) can the IAT wires be extended without causing resistance problems? (it looks like the plug was ran to fit an iat on the side on the intake manifold....my iat is on the back of the mani)
<FONT COLOR="red">Extend them with no issues.</FONT>
9) what is the purge valve on the back of the z6 mani? (it's black and looks like it needs 2-wires) where do i get these wires from (meaning what part of the harness?? i dont have any left over plugs on my conversion harness)
<FONT COLOR="red">Don't bother. You have enough to worry about.</FONT>
i have been searching but cant seem to find the answers, and i know ryan(from rywire) is on the road (to the so-cal meet) not sure if peter is?
so if anyone has ideas on how to get the car running...let me know...thanks
my wiring has been hacked to pieces (i've had a few friends try to help me with the conversion, before i ended up going with a rywire harness) so heres the problems i have encountered so far:
for the jumper harness (made by a friend, but checked by rywire)
1) on the obd-1 side of the jumper pin d-4 (brown) has a loose wire...what is it for?
<FONT COLOR="red">Ground this wire when you want to check your ecu codes.</FONT>
2) on the ecu harness (3 plugs in the car that go to the ecu) i have 3 wires that are cut, they are a-8( red w/black) b-5 (white w/yellow) and c-8 (yellow w/red) .....what are those wires for?<FONT COLOR="red">Probably those wires were cut when the conversion from DX to SI was done. Those are the OBD0 vtec wires, etc. They need to be reconnected at the stock location on the OBD0 side. </FONT>
3) the extra plug on the ecu jumper harness (wired in by rywire) has 2 loose wire's, 1 white wire and 1 gray wire....what are they for?
<FONT COLOR="red">See #4</FONT>
4) coming from the engine harness, there is a plug to connect to the extra plug on the ecu jumper.... it has 2 wires that are loose, they are: 1 orange and 1 blue...what do they go to?
<FONT COLOR="red">These two wires are probably for the extra sensor on the distributor. CYP....cylinder position sensor that is not on the dx model.</FONT>
5) on my interior harness (by the engine bay fuse panel next to the "power" plugs) there are 5 wires that have been cut and had wires of different color added to them (for length?) this is how the wires go:
blue w/ white ------> red w/black
green w/black -----> yellow w/white
(two wires are ran together)
blue w/yellow -----> light blue
blue ------> brown
(two wires are ran together)
black ------> black w/yellow
what could these wires go to?
<FONT COLOR="red">Beats me but this is definately why I hate working on other peoples messes. Probably want to start over with a package from dx to mpfi OBD1 from rywire.
These are probably the vtec wires, etc. ran from the OBD1 side of the harness. Trace the wires back to the harness and tell me where they are coming from....OBd1 side.</FONT>
6) theres a 4-pin connector (in the same loom as my map sensor wires(also cut))
-blue
-black w/ yellow
-green
-black
where do these wires go?
<FONT COLOR="red">Possibly 4 Wire O2 sensor.</FONT>
7) also on my fuel injector clips dont seem to fit on the fuel injectors, do i have to use obd-1 clips for obd-1 injectors? (right now the clear/yellow clips wont go on any of my fuel injectors)
<FONT COLOR="red">There is a small block in the center of the injectors that you have to cut off.....X-acto knife works great. </FONT>
8) can the IAT wires be extended without causing resistance problems? (it looks like the plug was ran to fit an iat on the side on the intake manifold....my iat is on the back of the mani)
<FONT COLOR="red">Extend them with no issues.</FONT>
9) what is the purge valve on the back of the z6 mani? (it's black and looks like it needs 2-wires) where do i get these wires from (meaning what part of the harness?? i dont have any left over plugs on my conversion harness)
<FONT COLOR="red">Don't bother. You have enough to worry about.</FONT>
i have been searching but cant seem to find the answers, and i know ryan(from rywire) is on the road (to the so-cal meet) not sure if peter is?
so if anyone has ideas on how to get the car running...let me know...thanks