Using 94 vx harness for JDM b18c swap. Where to run wires?
Ok vtecvillan informed me it would benefit me to use my stock vx harness rather then purchase a USDM gsr harness. Now he stated that i had to add two plugs and three wires total. Knock sensor plug with the wire, and IAB plug with the two wires coming out of that. I am salvaging the the plugs and wires from the JDM b18c harness. My question is where do i run the knock sensor wire and the IAB wires to? Can i run them to the shock tower plugs or do i have to run them into the cabin and directly into the ecu plug. I would rather run them to the shock tower plugs because it would be cleaner. Which plug(s) and location on the engine side of the vx harness should i run the three wires too. Also when i remove the knock sensor and IAB plugs and wires from the jdm harness what should i do just follow the wires all the way down and then unpin them from the plug they lead too. Thanks ALOT
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993sir »</TD></TR><TR><TD CLASS="quote">yeah well obviously vtevillian doesnt know what the hell he is talking about, cuz you would bene fit greatly from a usdm gsr harness and then you wont have to abdd any clips you would just have to run the wires from the civic harness at the shock tower straight to the ecu.</TD></TR></TABLE>
Thank you very much. I guess since you are the expert here I'll let you explain this one to me: Why would you need to run wires from the shock tower to the ECU if you use a GSR harness? The VX model has the D15Z1 VTEC-E motor so all the VTEC wiring is present. The only thing missing would is the knock sensor (1 wire) and IAB (2 wires), both of which can be wired up using existing wires in the cabin harness. It's a simple repin, no added wiring or "clips" is necessary.
The same applies to reusing the stock VX engine harness as well, the only problem is the factory VX O2 wiring (wideband O2) which is again also a simple fix. The only reason I said that it would be a good idea to use the VX harness was to save the guy a hundred dollars or so. The extra work is, as simple as it is, might be worth saving a few dollars that can go toward something else.
Everyone has their own opinions and we all come here to learn and help (some of us). There's no reason to straight out talk trash only because you think your way is "right." So next time before you try and make someone look bad, remember you might be the one who gets 0wNeD y0!
Thank you very much. I guess since you are the expert here I'll let you explain this one to me: Why would you need to run wires from the shock tower to the ECU if you use a GSR harness? The VX model has the D15Z1 VTEC-E motor so all the VTEC wiring is present. The only thing missing would is the knock sensor (1 wire) and IAB (2 wires), both of which can be wired up using existing wires in the cabin harness. It's a simple repin, no added wiring or "clips" is necessary.
The same applies to reusing the stock VX engine harness as well, the only problem is the factory VX O2 wiring (wideband O2) which is again also a simple fix. The only reason I said that it would be a good idea to use the VX harness was to save the guy a hundred dollars or so. The extra work is, as simple as it is, might be worth saving a few dollars that can go toward something else.
Everyone has their own opinions and we all come here to learn and help (some of us). There's no reason to straight out talk trash only because you think your way is "right." So next time before you try and make someone look bad, remember you might be the one who gets 0wNeD y0!
93sir i didnt post a thread asking what people thought what harness would be better, i posted asking where to put 3 friggin wires, so unless you know that answer dont clog my thread with bs statements. Thanks
VTECvillain would you be able to tell me where to put those wires. Where to run the knock sensor wire to and where to run the two wires for the IAB. Thanks man
VTECvillain would you be able to tell me where to put those wires. Where to run the knock sensor wire to and where to run the two wires for the IAB. Thanks man
I wish you were a little closer to me. We could knock all of this out in less than 15 mins. Let me try to get some detailed pics for you. I still have my VX harness sitting around. I'll trace a few wires and let ytou know what can be done.
dwnthehatch i live in philly its kinda a hike. But when you take a look at that vx harness if you could just tell me what mods i have to make to the shock tower harnesses that be awesome. Thanks alot - Bob
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993sir »</TD></TR><TR><TD CLASS="quote">okay you first may want to rethink what you said, cuz on the vx. chasis hanress from the shock tower to the ecu, the car is not pre wired for a knock sensor or an iab so yes you will have to run the wires like i said, and you will have to take the one org/blu wire from the 4th chasis harness plug and repin it into one of the other clips to that you wont have a cel for an o2 sensor. and after you realize what you have said, matter of fact to what you said and see if you dont check three cels one for the knock, the o2 and after the knock dont work youll get one for the vtec sol. because the knock is not pre wired in the harness like you think. so go ahead and do what you want, people on this site suck major dick. </TD></TR></TABLE>
LOL....adding a knock sensor and IAV (sp?) wires is far easier than trying to get a JDM harness to stretch and fit. OH NO ITS NOT PREWIRED IN THE HARNESS!!!!! wow you run 3 wires to the ecu big ******* deal. i had to run all the vtec wires in my ls and it took me like 15 minutes.
LOL....adding a knock sensor and IAV (sp?) wires is far easier than trying to get a JDM harness to stretch and fit. OH NO ITS NOT PREWIRED IN THE HARNESS!!!!! wow you run 3 wires to the ecu big ******* deal. i had to run all the vtec wires in my ls and it took me like 15 minutes.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993sir »</TD></TR><TR><TD CLASS="quote">exactly my point what are you talking about jdm harness, i said it would be better for him to run a usdm gsr harness so he wouldnt have to add the extra clips they would already be there. and so he would only have to run them from the shock tower civic side of the harness to the ecu, instead of adding a clip and running it to the shock tower engine harness clip and then run the wire from that clip to the ecu. and im done talking about it, so reply if you want i dont care i know the way i said is easier to **** you if you dont like it.</TD></TR></TABLE>
sorry i thought i saw JDM gsr harness in your 1st post but you said usdm. but he already has a USDM VX harness so i would just use that and run the extra wires to the ecu. thats what I did with my b16a. still running those 3 wires is very easy and saves him money over buying another GSR harness.
sorry i thought i saw JDM gsr harness in your 1st post but you said usdm. but he already has a USDM VX harness so i would just use that and run the extra wires to the ecu. thats what I did with my b16a. still running those 3 wires is very easy and saves him money over buying another GSR harness.
ok so basically all have to do is run the wires into empty pin slots in the shocktower harnesses and then down into the ecu and im done. Correct or no
1993sir - You need to chill out! The Hybrid forum is pretty good on H-T and a lot of people enjoy it. If all you have to contribute is a bad attitude, then go somewhere else because I can assure you that you won't be here for long. It seems like you have some knowledge and know what's going on but don't act like you know everything or that your ways are superior. If the guy wants to use a VX harness then let him use it. 
Ok now back to the topic at hand: Using 94 vx harness for JDM b18c swap. Where to run wires?
Hookedonhatch - I currently own a 92 VX with a 99 B18C1 swap and I've had 2 other swapped VX's in the past. Using the VX harness isn't bad at all. What you are asking about the wiring I can tell you exactly where everything goes. Just to give you a better understanding, you'll be running the wires from the sensors (knock and IAB) to the shock tower plugs. From there you can actually use wiring that is already present in the cabin harness, that is no longer needed since you aren't using a VX anymore.
If you want to make it as stock as possible it will take some extra work. You would obviously need to run the wiring through the VX loom which requires untaping some sections and feeding it through. It'll take a while to do it that way, but the end result will be wiring that no one can tell has be done.
Knock Sensor
1 wire (RED/BLU) which should be shielded (bare wire spiraled around the RED/BLU). If you salvage the knock sensor plug and wire from the JDM harness it will be shielded. The knock sensor goes to D3 for the GSR ECU. The VX has a wire (BLU/YEL) at pinout D3 which is the heater control for the VX O2 which now isn't necessary. This wire goes out to the 6 connector plug on the passenger side shock tower. You will run the knock sensor (RED/BLU) or whatever the color wire you add over to the BLU/YEL wire (#3 connection) on the chassis side of the plug. You will unpin the WHT wire on the engine side of the plug (this originally goes down to the VX O2 sensor) and add your knock sensor wire in it's place. The bare spiraled part of the shielded knock wire (you did use shielded wire didn't you?) should be given a ground, it's best to do on the thermostat housing where all the common grounds come together. If not, I'll leave that up to you as it could be grounded almost anywhere.
Intake Air Bypass (IAB)
2 wires (PNK/BLU and YEL/BLK) will need wired up. The YEL/BLK needs a 12V+ source so it can be tapped into nearly any YEL/BLK wire under the hood. Due to it's location it's easiest to tap into any YEL/BLK of the injectors or the IACV. The PNK/BLU need to be connected at A17. Again your VX should have a wire (GRN/BLK) at A17. This is originally for an automatic car and the wiring is usually always present, if not then you will need to run your own wire from there to the location I talk about next. This GRN/BLK goes to the 14 connector plug on the driver's side shock tower. You will run the PNK/BLU wire to the GRN/BLK wire (#13 connection) on the chassis side of the plug. There will be a GN/BLK wire on the engine side or a rubber plug if there's no wire present which is where you need to pin in the PNK/BLU wire.
4 wire O2 Sensor
The VX uses a factory wideband O2 which will not work with any other ECU's. You will need a standard 4 wire O2 sensor which is GRN, 2 BLK and WHT. You should unpin the engine harness side plug from a harness that uses a 4 wire O2 and then repin the necessary wires to it as follows:
VX ORG/BLU ----- 4 Wire WHT
VX YEL/BLK ------ 4 wire BLK (either BLK)
The other BLK needs 12V+ source, the same as done for the IAB.
The GRN needs a ground, the same as done for the shielded wire on the knock sensor.
That's about it, if you run into any trouble or if you don't understand anything, just let me know. After wiring it up, you should have a fully functional CEL-free GSR motor setup in your VX. Enjoy.

Ok now back to the topic at hand: Using 94 vx harness for JDM b18c swap. Where to run wires?
Hookedonhatch - I currently own a 92 VX with a 99 B18C1 swap and I've had 2 other swapped VX's in the past. Using the VX harness isn't bad at all. What you are asking about the wiring I can tell you exactly where everything goes. Just to give you a better understanding, you'll be running the wires from the sensors (knock and IAB) to the shock tower plugs. From there you can actually use wiring that is already present in the cabin harness, that is no longer needed since you aren't using a VX anymore.
If you want to make it as stock as possible it will take some extra work. You would obviously need to run the wiring through the VX loom which requires untaping some sections and feeding it through. It'll take a while to do it that way, but the end result will be wiring that no one can tell has be done.
Knock Sensor
1 wire (RED/BLU) which should be shielded (bare wire spiraled around the RED/BLU). If you salvage the knock sensor plug and wire from the JDM harness it will be shielded. The knock sensor goes to D3 for the GSR ECU. The VX has a wire (BLU/YEL) at pinout D3 which is the heater control for the VX O2 which now isn't necessary. This wire goes out to the 6 connector plug on the passenger side shock tower. You will run the knock sensor (RED/BLU) or whatever the color wire you add over to the BLU/YEL wire (#3 connection) on the chassis side of the plug. You will unpin the WHT wire on the engine side of the plug (this originally goes down to the VX O2 sensor) and add your knock sensor wire in it's place. The bare spiraled part of the shielded knock wire (you did use shielded wire didn't you?) should be given a ground, it's best to do on the thermostat housing where all the common grounds come together. If not, I'll leave that up to you as it could be grounded almost anywhere.
Intake Air Bypass (IAB)
2 wires (PNK/BLU and YEL/BLK) will need wired up. The YEL/BLK needs a 12V+ source so it can be tapped into nearly any YEL/BLK wire under the hood. Due to it's location it's easiest to tap into any YEL/BLK of the injectors or the IACV. The PNK/BLU need to be connected at A17. Again your VX should have a wire (GRN/BLK) at A17. This is originally for an automatic car and the wiring is usually always present, if not then you will need to run your own wire from there to the location I talk about next. This GRN/BLK goes to the 14 connector plug on the driver's side shock tower. You will run the PNK/BLU wire to the GRN/BLK wire (#13 connection) on the chassis side of the plug. There will be a GN/BLK wire on the engine side or a rubber plug if there's no wire present which is where you need to pin in the PNK/BLU wire.
4 wire O2 Sensor
The VX uses a factory wideband O2 which will not work with any other ECU's. You will need a standard 4 wire O2 sensor which is GRN, 2 BLK and WHT. You should unpin the engine harness side plug from a harness that uses a 4 wire O2 and then repin the necessary wires to it as follows:
VX ORG/BLU ----- 4 Wire WHT
VX YEL/BLK ------ 4 wire BLK (either BLK)
The other BLK needs 12V+ source, the same as done for the IAB.
The GRN needs a ground, the same as done for the shielded wire on the knock sensor.
That's about it, if you run into any trouble or if you don't understand anything, just let me know. After wiring it up, you should have a fully functional CEL-free GSR motor setup in your VX. Enjoy.
OUCH 93sir, Vill OWNS you! Dont mess with the best man, what I know I've learned from him and guess what it all work, so go take a **** in some else's lawn.
vtec villain thanks a **** load man, i really cant thank you enough. I had a complete mental block but right now i feel like i could wire this thing in my sleep. I really want to thank you for takin the time to type out the pin positions. 

93civicsir dude you didnt try to help at all bro, all you did was bitch the entire time about what harness is easier. Obviously vtecvillain knows wtf he's talkin about and basically dude not to be a hater but when it comes to helpin dudes out with wiring VTECVILLAIN OWNS YOU.


93civicsir dude you didnt try to help at all bro, all you did was bitch the entire time about what harness is easier. Obviously vtecvillain knows wtf he's talkin about and basically dude not to be a hater but when it comes to helpin dudes out with wiring VTECVILLAIN OWNS YOU.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993sir »</TD></TR><TR><TD CLASS="quote">he just cut and pasted those instructions from someone else</TD></TR></TABLE>
You just don't give up do you? Since you couldn't answer the question why not at least try find this information somewhere else other than this post. I can assure you that you won't, considering I mapped out all of the pinouts using a 92 Civic and 95 Integra Helms about 3 years ago when I did the first swap in my VX. I've provided numerous people on H-T with helpful swap instructions, mostly with the 92-95 Civic VX model since I have the most experience with those. I never received my H-T title from copy and pasting or taking credit for other people's work.
You just don't give up do you? Since you couldn't answer the question why not at least try find this information somewhere else other than this post. I can assure you that you won't, considering I mapped out all of the pinouts using a 92 Civic and 95 Integra Helms about 3 years ago when I did the first swap in my VX. I've provided numerous people on H-T with helpful swap instructions, mostly with the 92-95 Civic VX model since I have the most experience with those. I never received my H-T title from copy and pasting or taking credit for other people's work.
93sir i dont wanna come and talk to you. dude if your not helping just leave, your dying for desperate attention on this thread. Your a dick and dont know what your doing. Leave my thread
Sorry I have not got back to you. My basement flooded and I have been ripping up carpet all weekend. It looks like VTECVillain answered all your questions. He had a major role in my vx swap.
If you need any more help PM me.
If you need any more help PM me.
Thanks alot dwnthehatch you have been mad helpful also. You instructions are perfect dude. Sorry about your basement. Thanks again
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