here are some schematics and heres what ive done:
from the schematic, you dont use the high side recirc. switch being normally open.
i see that the low side switch on C2 pin 11 is normally closed, and needs ground. i currently have that wire from pcm going to ground chassis ground.
C2 pin 17 A/C request, accoring to painless says to tap that wire into the clutch 12v side, pin b. which means 12v. ive applied 12 v from the clutch side and the car doesnt idle any higher at all, still bogs down, and still dies. like i said, ive bumped the a/c on idle to 800, which is a noticable difference than 650. with hp tuners, i can turn on the clutch coil in vcm controls and no difference in idle.
C2 pin 43, the (pcm output) ground side of the clutch coil i get 14Kohmns when the (vcm controled) a/c clutch is off and 14ohmns when on. i've checked out a 2nd car, with a painless harness and his computer has the same ohmn reading. in painless' harness the C2 11 low pressure signal is grounded to the chassis.
the ohmn reading were taken from that pin 43 to battery ground.
painless' harness also doesnt use a clutch relay, they assume that your using factory a/c wiring, and thats what im doing. ULTIMATE goal is to wire it through the relay so at WOT the a/c will cut off automatically, as it should.
as far as the request wire... i dunno, im still waiting for a friend to bring his 01 silverado to work so i can remove his high pressure switch (behind the compressor) and backprobe the wire and see what voltage it has.
from what ive been told by my electronics teacher is that from the schematic on the a/c controls (hvac) the signal should be ground. ive also tried ground, no idle difference.
any of that help, hopefully i didnt confuse you with that
thanks for the insite so far, hopefully we can come to a successfull conclusion!