So I have an issue. How about a 1992 prelude s had no motor transmission and the guy that I bought it from sold the wiring harness and whatever ******* bought the wiring harness off of them cut the wiring harness from inside the cabin so we can get all the connectors so basically the wiring harness from the passenger footwell was cut and severed the wiring harness from the fuse block and the leads going out of the firewall into the engine compartment. I posted a picture so you can see what I'm talking about. So I have to rewire the whole thing myself and I'm getting all the connectors to do it and I don't mind. But I can't find pictures of the inside of the passenger side footwell of like a 92 or 93 where the ecu's at so I can see what the connectors look like or what the leads look like coming out of there. And on top of that I need to know how many connectors that I need to build my own wiring harness. I have an OBD2 wiring harness from a 98 Civic that had VTEC so I have 80% of the connectors that I need for the engine and I'll buy the rest of them but I really need pictures and some sort of info on the wiring going from the passenger side footwell and the main harness out through the firewall and pinouts if you guys have them just whatever information you guys could give me would be ideal. And yes I tried searching and searching and searching I just can't find anything that's really definitive. I'm going to do the whole wiring harness myself custom because I was going to tuck it anyway as if I have to cut it and the fuse blocks already cut I might as well just relocate that to where the glove compartments at or something like that but I'm going to do the whole thing from scratch I'm tired of trying to hunt for one I'd rather just do it right. So yeah any pictures or information you guys can give me would be freaking fantastic.

 

You have to pardon any grammatical errors or spelling or anything that just kind of doesn't make sense. Google speech to text has been totally kicking me in the nuts lately for some reason and that's what I had to use to do this. So I apologize for that but I think you guys get the gist of what I'm saying

 

Search for the factory service manual. Should be available in pdf form online. It will have all the wiring information you're looking for like what colors go where, etc. Alternatively a Haynes manual might also have wiring information.

 

Is that just the part that goes to the ECU that's been cut? If so, you could try buying a used set of pigtails for the ECU

https://www.ebay.com/itm/174765406820

If you need an ECU, and are planning on doing a swap, there should be plenty of places to get aftermarket pigtails for whatever ECU you end up going with.

 

So this is where I'm at. I have an OBD2 Honda Civic wiring harness that had a SOHC VTEC motor in it. It had most of the stuff I needed as far as the connectors. I just got the pigtails for my injectors. I'm going OBD1 and will be running Neptune and demon whatever chippable ECU I managed to run across. I'm going to get a set of strut Tower connectors depending on what I end up finding they may or may not be from Honda but though at least be the right pins and it'll give me the ability to disconnect the wiring harness like it came from the factory. I'm going to source an OBD1 distributor and change connectors over on that and then of course the alternator but because I already have all the stuff for the VTech solenoid or pressure switch setup on the OBD2 wiring harness I think I should be good. Worst case scenario I'll just have to get a couple of extra connectors or swap a couple extra ones but for the most part I have the wiring for the engine bay good to go. I'm also going to be running ultimately a g22 so an F22 block with an h22a4 head. I actually have a full h22 A4 motor like I have the full long block. I just don't want to run the bottom end in favor of going with cast iron sleeved short block for boosting. Because I'm eventually going to turbocharge it.

So they didn't cut it at the pigtails. So with the wiring harness I stripped back all the insulation off of the wiring harness from the pigtails to about the stereo. So basically from the pigtails all the way up to the hole in the firewall where it leads out into the engine bay and then from that hole in the firewall to the engine bay to the left side halfway across the car cuz I want to make sure they didn't splice anything else in and they did they wired in a shitty alarm and did that very shittily. So I'm in the process of unfucking all of their fucked up wiring. It's been fun. But essentially they cut the whole trunk that leads into the engine bay so any wire that was leading from the main harness into the engine bay it's been severed which includes the ones from the pigtails they go to the ECU that gets split between the main harness and the engine bay like grounds and all. I'm not sure what they're trying to do. My hypothesis is that they were trying to relocate the fuse block in the end and they ended up not doing that so they kind of just left it and took the engine harness and everything. So Michael now is to go through and check everything from the engine harness or rather the main harness to the engine harness and get that all wired back to stock and then go ahead and repin everything from the Prelude to work with an OBD1 Civic ECU or an Integra ECU. The repenting won't be hard especially if I said everything back to stock as far as the wiring goes but yeah like at this point I just have a whole bunch of wiring to go. Is there anything I need to look out for that you guys might know about like any tips you can give me on I don't know rewiring it or any pins that need to be redone that you guys just know right off the bat. Like I know some of these repinnings are easier than others and so some of you may have done it enough times where you know off the top of your head. I'm also going to be tucking the wiring harness and I've already started to cut and get mounts ready to mount the fuse block in the glove compartment or rather above the glove compartment. So any tips you can give me on that that would be awesome. I'm also going to upload some pictures right now of what it looks like and where I'm at though it looks a lot better now than it did before. I don't have the now pictures from tonight where I started connecting everything back together I'll post those tomorrow.

As far as current ecu's I have an F-22 single cam non VTEC ECU that is the stock one that came with the prelude. It's a 92 Prelude desk. Obviously OBD1 the dude that gave me the car also had a p13. And I didn't really give it much thought I just assumed it was an OBD1 ECU but it turns out it's from a 96 Prelude VTEC which is I'm sure you guys know I know and OBD2 VTEC h22 ECU for a 4th gen. Which I didn't realize that I had. Obviously if I want to run up to and I'm going to have to stay on OBD1 which I'm completely fine with. But if any of you guys are out there trying to pass bar with the state ref and just happen to have a 96 I have a p13a12 that I want to sell or I'd be willing to trade straight across for either it shipped or chippable OBD1 ECU so I can throw a demon V2 on it.

So yeah that's where I'm currently at. Obviously it's a giant mess of wires I still have to untangle and reconnect all the stuff they cut and splice their stereo and other **** into which is underway but it's just going to be you know a time consuming task. While I'm in there doing that if you can think of anything that might be handy for me to know while I'm doing that considering I have an OBD2 wiring harness from a VTEC Civic that I'm going to repurpose the connectors and try and use as much of the stock wiring as possible and I'm also going to be doing a tucked wiring job on it that would be handy. Also if there any caveats to running like a p28 or a p72 like you know an Integra or Civic ECU in the Prelude if there's any like pinouts that I need to know if somebody already has a fourth gen with a chipped p28 or whatever ECU in it that's OBD1 if somebody already has those pinouts and what I need to switch can you post a link please cuz I tried searching and there's a lot of different stuff and I actually found some conflicting information so I figured it doesn't hurt to have more of this information available especially it'll make it easier for people to search and find that information the more articles that are available or at least the more articles to talk about it. Thanks again for your guys help I really appreciate it. I'm also looking for any fourth gen parts that you guys might have I wouldn't mind getting a set of like projector headlights if some of you guys have those. I shaved the whole car of the exception of the door handles so wiper nozzles the key hole on the back of the trunk the little license plate insert the rear antenna like anything that could be shaved off that I wasn't going to use or I didn't like I took all that down too and I'm in the process of doing the body work and hopefully going to be getting it to paint in the next week or two. But yeah any tips any pointers anything you guys got laid on me cuz I am searching and researching on a daily basis but it's always nice to reach out and ask the Honda community what their opinion is and you know what they would do just so I can get it from all sides. Anyway thanks again for having me part of the forums it's nice to be back into working on Hondas I'm excited about the project and yeah I look forward to hearing you guys give me some very harsh criticism on my car when I finish. LOL.

Like my last post please forgive any grammatical or spelling errors that should arise from this post or within this post just because first off that was drinking a little bit earlier and I was using Google speech to text and that thing is just been screwing me left and right lately