Tipsy86

Ok i been looking for an h22a1 engine harness. Pm people who were parting out parts but no answer. I did some search and found out i can use h23 engine harness. I found thread on here that had a link to another thread talking about it. Clicked it but the link was dead. Can anyone give me a link or guide me on what to do. i saved a pick from rywire.com ob1 sub frames harness diagram. Please i'm tired of looking for used h22a1 harness and want to get my car up and running asap.

jprelude92

you can use the h23 wiring harness on the h22 but you would need to run 2 wires to the back of the wiring harness that plugs into you ecu to run the vtec solenoid and oil pressure switch unless your prelude came prewire im doing the same thing on my 4th gen im gonna be using the h23 harness with the h22 motor

jprelude92

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minilogoguy18

Yeah it's even easier if you bought a import motor and it came with the RHD harness and you can just take the plugs you need and trace them back to the main plug and pull the pins and put them in the H23a1 harness. But you might already have the vtec solenoid plug, look at your passenger shock tower and there might be a green plug with a grn/yel wire and the plug will be plugged to a dummy slot.

Tipsy86

my h23 is a 92 which prolly didn't come with it pre-wired. but i ordered a new h23 off a 94 uncut harness. I'm hoping that one is pre-wired. Thanks again guys. Is there i link anyone can give me that has a picture on this. Im not really good at reading. Im more of a visual learner. Is there anything else also should do or know about. Is it just a matter of connecting vtec solenoid/pressure... i don't need to do nothing else.

jprelude92

when i get a chance i'll take some pictures so you can see
did your engine come with any sort of cut wiring harness cuz you will need the plugs for vtec solenoid and pressure switch if you have those two it should be easy i'll try to walk you thru it

Tipsy86

the original h22a1 harness is completely hacked. the connector from strut tower to vtec solenoid is missing and the knock sensor is not even connected so i took it out the h22a1 harness. As i looked at it today im starting to think its not even an h22a1 harness. I am goin order new connect. I think this is the right one. I'm going to use the new connect and route it to the ECU.


# 19 - CABLE, SUB-GROUND (DOHC,VTEC)


Im also finding alot of post talking the a distributor. is that anythign i should worry about.

jprelude92

checkout this http://www.ff-squad.com/technet/wiring.obd1.htm
conector A PIN 4 is for vtec solenoid
connector D PIN 6 is vtec pressure switch
look at the back of the plugs that plug into you ECU they should be empty

jprelude92

this is what you need

Tipsy86

i have the pressure plug but not the vtec solenoid, can i cut the vtec soleniod plug and solder a wire to the solenoid and then connect it to the ecu.

jprelude92

that i don't know but i guess i don't see why it wouldn't work i wouldn't do it i'm picky
also remenber the vtec pressure switch plug has to wires one goes to the ecu and the other one has to be grounded

jprelude92

also the pins that go on the back of the ecu plugs are different one pin is bigger than the other A4 IS BIGGER THAN D6 PIN

Tipsy86

well what i did for the mean time is cut the wire at A4 and D6 and solder new wire to them and ran them to my engine bay and i solder D6 to my oil pressure plug and grounded the other wire. I pre-connect a wire with a pin on it and stuck it in the vtec solenoid and it's on there nicely. So i don't thinks moving anywhere, plan to wrap electrical tape around it so no water gets in it. As for the mean time i'm working on my IAB which was completely disconnected.

jprelude92

i have a 92 prelude si came with an h23 and the plugs that connect to the ecu the slots for vtec solenoid and pressure swuitch were empty so either ypur car came prewired or you cut the wrong wires if your car was not prewired there should be nothing there.
when iwas trying to figure out this myself i was looking at the front of the plug so at firts i thought my car was prewire but then i figured out .

jprelude92

look at the picture of my ecu look at the plugs were you see the light blue is A4 for vtec solenoid and GREEN/YELLOW D6 is for vtec pressure switch

nus_dogg

Yeah, re-use your H23 harness. You then add VTEC and Knock sensor wire from its sensor to the ECU. Its simple.

dannywalton2000

Here is my question,,,,,,I did a h23a vtec build with a h22a head. i used the 1993 h22a VTEC motor harness (under the hood) but not the body harness, (under the dash to the ecu). i still have the 1992 SI h23a harness to the ecu undr the dash. only harness used from the 93 is the motor. i throw a cel 21 vtec solenoid. i have tested the solenoid and it is good. Am I maybe missing the wire from the motor harness connection to the ecu for the vtec solenoid and pressure switch? I didnt think about if maybe the body harness was diferent or not but it seems no matter what I do my vtec wont work and it throws the cel as soon as i turn the key on.

jprelude92

jprelude92

I did this about 5 years ago but what I do remember is that there's I forgot either one or 2 wires that you have to run from the engine harness vtec solenoid plugs to the back of the chassis harness that connects to the ecu you would have to look at at a wiring schematic to see where it goes also you would need a h22 ecm , I sold the car about 4 years so I can't go look and see what wires you would need to run

snobordboy

The 1992 body harness from the engine bay to the ecu probably does not have the vtec wiring, so you would need to run the wires as shown from the proper ecu pins out to the connectors for the engine harness.

dannywalton2000

cool thanks guys. only had 1 hour between my 2 jobs so i couldnt pull my ecu to look at the harness. I know i do have the h22a vtec motor harness installed, just not the body harness to the ecu. Also I do have the vtec ecu p13 installed. I have 2 hours between jobs tomarrow so ill pull it and check. Thanks again.

snobordboy

Should be very apparent when you look at the ecu pins, it won't have the light blue wire or the green w/ yellow wire.

dannywalton2000

sure enough the 92 body harness does not have the vtec wires. ran my own everyuthing working. thanks for all the help