Auto hatch control circuit question

[Mackskibum]

Anyone know how the auto hatch lift knows where in the cycle it is? The Idrive has multiple opening positions you can choose. This implies some type of encoder circuit to position in proper place.

Here's my problem- '10 35d. Worked fine yesterday afternoon. Last night I opened the hatch and it did not lift itself. There was constant pressure in the down position. I had to remove cargo - lifted up on the hatch and the left side actuator broke in half. Removed left actuator. Right side wants to continuously push down. Seems like the index is wrong. Thoughts?

TIA

[Xtony]

Don't know if this will help, but when my tailgate stopped opening and closing with the buttons, it was very hard to open and close manually. I was able to get a code read which showed open circuit right strut (or something like that). Replaced the right strut and all is well. If one strut fails, the other one won't work either.

[Mackskibum]

Yeah I figured that one won't work without the other- they need to be synchronized to keep the hatch from opening crooked. When looking at the wiring on the broken one, there are 5 wires- power and ground for the servo and 3 more on a second connector that I assume are power, ground and signal back to the hatch control module. Looking at the service history there was a module failure 2K before I bought it.