Alright, I finally got the transmission controller in the mail, but before I grab my soldering iron, I need wiring diagrams. I found a pinout diagram from an old grandpirxforum post, but other than that, I haven't been able to find anything useful. I have a 98 4T80e, and the number of connector pins as well as their layout match, but the wire colors don't correspond to the ones on my connector. I only need four wires, besides the positive and negative connections. The wires I need to locate are TCC solenoid, shift solenoid A, shift solenoid B, and line pressure solenoid. Does anoyone have some good diagrams/pinouts?

 

I'm currently trying to find a free pdf download of a 98 olds aurora service manual, cause my 2000 monte carlo service manual has the trans connector pinout.

 

Update:

I hit up Brandon Furches and he sent me this pinout, which I trust a lot more than the dated, blurry one I found earlier. He was also super helpful in answering some questions I had. A and B are both switched by negative, and share a common 12V. The 12V to the trans is connected to both E and U. The trans controller I have needs one conection for line pressure, which is pin C, the high side. But I'm not sure if the low side gets grounded. I need to check with the controller manufacturer. The trans also does not require a ground, just the two 12V connections.

 

I don't know Brandon, but from what I have seen of his online posts and videos, he does great at sharing information. I know he's in the business of selling parts and performance builds, but he appears very approachable and happy to help (regardless of cutting a profit). Your info helps support that. Great people to have in the car community.