T43 TCM Bench Harness Pinout

This one is inside the transmission, but you can use the bench harness in vehicle, with the transmission out of the vehicle, or with the bare module on the workbench. NOTE: This module needs a decent power supply, it'll pull 1-2 amps when powered up on its own. Since you're usually flashing TCMs with ECMs hooked up as well, you need to account for the other 0.3-0.6 amps for your flashing tool and ECM. When flashing the TCM the power draw does drop to the same level as other modules. Pay attention to the orientation of the plug when using a bench harness. Without all of the factory collars and housings you can plug the TCM plug in multiple orientations. I have not damaged one to my knowledge plugging it in wrong, but if you use this pinout and pay attention to the little white square on the plug it'll be easy to plug in correctly.