ecu=no power

[trogdor]

alright, so i just pulled out my ca18 and swapped in a blacktop s13 sr20det.

everything is plugged in i believe and all of the grounds are down tight (the two on the 4th runner on the intake manifold, battery ground, coilpack, etc)

the problem: the ecu is not getting power. the ecu is not fried because i swapped it out and tried it on my buddy's car that we swapped.

here's the deal:

when key is on ign (all three wires below are on the big grey plug behind the passenger side headlight):
-black-red has 12.25v
-red has 0v
-black-white has 0v (naturally, because the ecu is not clicking on)

so, i hotwired the red into the black-red and they are now getting 12.22v each.

i turn the key to ign...still no ecu power. black-white is still getting 0v.

what could cause this? what should i check?

other things ive done: tested fuses, tested alternator, tested relays, and still no dice.

help plz.

[makulit054]

do you still get voltage on the black/red-wire since you after you jumpered them. if there is no 12v on the b/r wire then you have a short somewhere.

[trogdor]

yeah, i still get voltage to the black/red.

why wouldnt black/white be getting power if red and black/red are?

[rps13drift]

Double check all the wires on the brown connector! I had the same problem and it turned out to be a bad pin so i redid it

[trogdor]

brown connector right next to the grey connector yeah?

i forgot to check all the pins to see if they were matching/in-tact but i'll do that tomorrow.

have a good 4th everyone