I've almost finninshed my long lasting swap (Prelude 92 Si to JDM H22A VTEC). But still there's a problem. VTEC is not working and the light "check engine" is on. I connected VTEC solenoid valve (grn/yel A4) and VTEC Pressure Switch (blu or lt grn D6). But I can not find where I get the ground wire for VTEC pressure switch (blk/red A26). Everybody in internet always refer to such a connection, but one local technician that helped me, said that since the Pressure Switch is on the block, it's already grounded. Then, maybe I ran the wire to a wrong switch (to Knock Sensor?)? Does anyone has a picture of it? Where the black wire should come exactly from the pressure switch? Please explain.