i know this has been covered before but i did a search and didnt come up with good results. i have a 95 lude and i'm thinking of putting a jdm h22 in to replace my h23 in the future. i read somewhere that some ludes are prewired for vtec. so i looked and i found the vtec solenoid wire (green with yellow strip) on the passenger strut tower. but isnt the pressure switch wire supposed to be there too (light blue)? i found a dark blue wire next to the solenoid wire but i dont know if thats the pressure switch wire. so i looked at my ecu and d6 has the pressure switch wire(light blue) and a4 has the vtec solenoid wire (green with yellow stripe).

so my ?'s are:
where is the pressure switch wire located if its prewired?
i also heard something about wiring something into pin d22....what is that??
is there anything else that i have to wire besides the vtec solenoid and pressure switch and ground for the pressure switch? (jdm h22 btw)

Thanks,
David

 

what wiring harness are you using? i just did mine and i used h23 wiring harness and i just added the vtec wires and just pinned them in and run them through the firewall. it works.

 

im going to use my original h23 harness (obd 1). so all you did was run the vtec solenoid, pressure switch and pressure switch ground wire? does the ground wire go to the ecu i saw something like a26 for it but i dont know though. so theres no other wires like knock sensor or anything like that to rewire?

btw...was your car prewired for vtec?

thanks,
David

 

im pretty sure there's only two wires that go to the computer. One from the pressure switch and one from the selonoid. Then i think the selonoid has a ground wire that you can ground anywhere.

 

aight man thanks for the info. anybody else know anything about the prewired bb2 preludes? or other things i need to look out for

Thanks,
David

 

A4 grn/yel VTEC Solenoid Valve
A26 blk/red VTEC Pressure Switch (GND)
D6 lt blu or lt grn VTEC Pressure Switch

If there are wires in these pins, it's pre-wired, if not you have to add them

 

ok then my car is prewired because they are pinned in the ecu but i cant find the other end to them to attach the pressure switch and stuff to. i thought it was supposed to be somewhere on the passenger strut tower but the only one i see is the vtec solenoid wire. so does anybody know where they're located??? and does anybody know if there are there ANY other wires i have to run other than the vtec ones?

thanks again,
David