I cant find the wires to vtec.

Here are pix.



Where is the plug that goes into that?

Next:





Ok, Those obviously plug together...Do I need to cut the wires and run them together?

 

bump

 

is your vtec pressure switch, it has to be wired to D6, and to ground (mine is wired to engine block).

the plug you are holding up is from your vtec solenoid - wire it to A4.

i dunno what you got going on over by your shock mount - possibly 93+ prewire for vtec.. maybe you just need to extend that wire.. if that plug fits it - i'd definetley use it.

 

First off are you using what engine harness H23?
For the vtec solenoid wire just cut/solder/heatshrink it to reach.

For the green bugger(vtec pressure switch) you need to get a honda vtec pressure switch connector from another engine harness( junkyard+ a pair of dikes).
Use mulitmeter(DVOM) and continuity check to find the vtec pressure switch wire that goes from the ecu to the engine/chassis harness connections(yellow circle is where that connect). Use the how-to-wire-vtec in the ***'s for the ecu pinout to findout which wire it is for the pressure switch. Then just ground the other wire to the ecu main ground on the thermo housing seen in your 1st and 2nd pic.

 

everything is already wired because I had a 93si. The 2 wires that I am holding look like they need to be plugged into each other...but they arent long enough. And the GREEN thing, I dont know what needs to be plugged into that...Or at least I cant find it..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SteveoBA8 &raquo;</TD></TR><TR><TD CLASS="quote">

For the green bugger(vtec pressure switch) you need to get a honda vtec pressure switch connector from another engine harness( junkyard+ a pair of dikes).

</TD></TR></TABLE>

it's just a switch, it's great if you can get another connector (i managed to) but not necessary, you could also wire directly to each pin (blade style connector?) (just make sure they aren't touching or shorting)... it's just a switch so it doesn't matter which pin you wire to ground and which end you wire to D6. it will function the same, just make sure it's not shorting.

 

Yea/\ if you cant find an actual connector you can do what he said.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AnthonyG2003 &raquo;</TD></TR><TR><TD CLASS="quote">everything is already wired because I had a 93si. The 2 wires that I am holding look like they need to be plugged into each other...but they arent long enough. And the GREEN thing, I dont know what needs to be plugged into that...Or at least I cant find it.. </TD></TR></TABLE>

well if you are prewired, extend that wire (splice!) over to the vtec solenoid.. then that will be done.

for the pressure switch, i'm surprised you don't have any more wires by your shock tower for that, and that's what i've been saying you have to wire it to D6 (on your ecu - yes thru the firewall and everything) and to ground.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Altilude &raquo;</TD></TR><TR><TD CLASS="quote">

is your vtec pressure switch, it has to be wired to D6, and to ground (mine is wired to engine block).

the plug you are holding up is from your vtec solenoid - wire it to A4.</TD></TR></TABLE>

You have to make your own plugs, just like people said. Your Si is not a vtec, thus the harness was not wired for the extra sensors that vtec's have. Extend the gray plug at your shock tower to reach the vtec sensor (gray plug), then you need to get a 2 wire plug from someone (I have several parts harnesses & can provide you one) & ground one wire then wire the other one directly into your ECU harness at D6.

Do a little more searching, it's been covered.

 

wow, I really hate wiring.

 

heh, looking at your pic.. of the shock tower....
and referring to this information

D6----lt blu or lt grn-VTEC Pressure Switch


it appears - you are pressure switch is also pre-wired, see that lt-blue wire? if that's not connected to anything, splice that over to one pin on the pressure switch, then wire the other pin to ground and you're done.

 

With VTEC not wired, would this throw a CEL? Would this also cause the car to hesitate?

 

heh it's really easy, use butt splices if you suck at soldering/heatshrinking.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Altilude &raquo;</TD></TR><TR><TD CLASS="quote">heh, looking at your pic.. of the shock tower....
and referring to this information

D6----lt blu or lt grn-VTEC Pressure Switch


it appears - you are pressure switch is also pre-wired, see that lt-blue wire? if that's not connected to anything, splice that over to one pin on the pressure switch, then wire the other pin to ground and you're done.
</TD></TR></TABLE> Hell ya, i totally missed that blue wire sticking our there. You prewired lucky punks

 

because i talk in circles - i hope this clarify's how easy this is.

 

Wow, Thats it? HaHa. Aight...1 more question. On that little green POS...How do I wire that? Should I get a connector? Can I wire it without one?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AnthonyG2003 &raquo;</TD></TR><TR><TD CLASS="quote">On that little green POS...How do I wire that? Should I get a connector? Can I wire it without one? </TD></TR></TABLE>

you can wire it without one, just be careful that whateva blade/etc style terminals you use to accept the pins don't contact each other or short.....

it's really up to you, if you want to wait til you get/find a connector that's fine, it's not gonna work better or worse without a connector, it will just be easier to unplug.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Altilude &raquo;</TD></TR><TR><TD CLASS="quote">


because i talk in circles - i hope this clarify's how easy this is.
</TD></TR></TABLE>

Ok, I did everything that is said there. I connected all the wires and did the ground. But when I did this my engine acted terrible, the tach wouldnt work and was just terrible. I unplugged everything and it went back to how it was before I tried this. Is there a certain side that the ground goes on??? What am I doing wrong?

 

meh.. i'm not really to sure what you did wrong. odd that the tach didn't work, especially since i'm pretty sure there is usually a plug by the shock tower for tach readings (like in a maintenance situation). I wonder if somehow you wired up that wire instead...

the only way to really tell would be to ring thru those wires that come out your shock tower, making certain that the grn/yellow one goes to a4, and that light blue one goes to d6 - otherwise if you wired it like is shown in the picture you should be fine...

there isn't a certain side the ground goes on, it's just a switch and switches don't (for the most part) care what side is ground.

i'm scratching my head over this one.. especially the tach part. was that lt. blue without a connector? just a dead end wire? (before you extended it).

 

That blue wire is the one that I used. I unplugged it and the tach started working again. Maybe that isnt the wire that I need? Its got a...Well...HAD...a connector on the end but it was just taped to the harness and since you all said thats the one that I need...I used it. LoL.

 

yeah i think u used the wrong blue wire i know for a fact the tach wire is light blue. i found that out when i wired in my aftermarket tach. you can always find another and follow it to the ecu make sure its the right one

 

well since I did that, Did/Could I have fucked something up by using that wire?

 

did you hook that blue wire back to where you got it? tach work fine? if so then you shoudlnt have fucked anything up

 

yea sorta my bad, i saw lt-blue and thought it would be an easy out for ya (since lt blue is one of the colors designated for the pressure switch going to D6)
it must have definetley been for the tach then (especially if you cut a connector off!).



as said above, see if you can find another wire around the shock tower that could be a potential for the pressure switch, if NOT, then you have to manually run the wire thru the firewall, and splice it right where it goes into D6.. there should be a pic around of the ecu plugs to help you determine exactly which pin d6 is.

 

start at the source as stated above go check out the ecu. check the pinouts for vtec and make sure everything is there. if the light blue wire is there try to follow it to its end. if not get a lil pin (metal connection to hold into ecu plug) and wire your own stated above.