OK here's an update. The auto level is working now. I replaced the rod with the seized ball/knuckle joint. I figured out how it works. Basically the connector going to the sensor has 3 pins. Pins 1 and 3 are + and - from the AFS ECU. The ECU provides around 5V of power through these pins. The height sensor reduces this to about 4.5V. The height sensor is essentially a variable resistor. This allows the voltage to change from 4.5v to 0.5V. the 4.5V. The ECU then reads this to determine angle.
Anyway my height sensors are now working. And one way i tested it for sure is with the car on level ground i crawled underneath the rear sensor and loosened the bolt that lets you adjust the height. When I moved this up and down I could clearly see the lights moving.
But now I have another issue, with my car on level ground and against a wall, I can see my beam is higher than it was before because the level sensors are working. However, the right side seems much lower than the left side. Below is a illustration of how I am seeing the beam reflection. Ideally I wanted to get the right one to move up so that the lines meet. However the right was much lower and I had to adjust the cog almost all the way to the limit to get it looking like below: Question is, is there any other way to raise the right hand side? The cog I am adjusting is the one on top. I know there is another cog but I didnt think the other cog will effect vertical height. Any ideas?