Hi, I installed my bought cruise control! The installation worked smoothly. However, I asked a few more questions. 1. How do I tension the cruise control train correctly?? Didn’t get it?! 2. The 4 pole brake light switch was available (i.e. I took off the clothing below and then saw the switch where 4 cables are attached. So think I’m the 4 pole?!) 3. Can’t get the cruise control to run somehow. It’s all right! Just it fits Is there a defect or something??? What can I do next??? Would be great if someone could give me advice! Many DANK