I think i might have asked this question on the old board but on the TGP ECM the pin for the turbo wastegate is A18(air select switching valve on n/a GP...vin W, T), but on my ecm the pin out is different cuz of the difference in connectors but same '737 ecm. I thought pin F2 was for the wastegate on the beretta ecm but no signal comes out(-) on overboost or normal boost. I had taken apart my old broken ecm from the BGTU and looked at the junkjard ecm from the TGP a while back and looked at the board on what the diference was and only a few diodes and different connector to the wires was all. Same processors, controlers and, transisters. I had followed pin A18  form the TGP ECM to its output device which was a 15 pin controler or amp switch Delco 16042368 IC.  Counting from the side that has a circle or gray line on the Delco IC I thought pin 13 was the output signal :D . I connected the turbo wastegate to it on the BGTU ecm but nothing come out. I might have misscounted the pin output on the IC or overlooked where it came out  :drinking: . Didn't take my Digital multimeter with me to the junkyard that day to verryfy the connection.

Here where you guys come in, on a broken ecm or open ecm ,with a multimeter connect one probe to pin A18, then find the pin on the Delco IC that has zero ohms or con. with the other probe. If you look at the open ecm upsidedown (side with nothing on it but surface mount resistors) and the connection ports towards your body the Delco IC would be on your left hand by the edge of the board. Pin one on the Delco IC would be from your left then the rest on out. Like I said I thought it was pin 13. let me know what pin you guys find.

Thanks.

Too bad I can't remember better. There is a site out there that interfaces the 7730 to the 7727 ecm. If I find it I'll post it. I don't have time right now to disassemble the ecm and check that for you though.

Chris

http://www.cruzers.com/~ludis/quadplugecm.html

Many thanks.. See what  you find tomorrow or you other guys...., :spin:

Pin A18 was pin F2 . I had it right. Guess I better switch ECMs, or find what's going on. :?  
U20 and U19 (the Delco chips quad drivers) are backwords on that schematic that they have on that web page. I checked it out myself . Pin F2 was going out from U20 not U19 . Checked my old ecm to verify that. Thanks anyways.