No travel light 2004 u320
I have a friend that has an 04 u320 no travel light, it does go to travel height. He said that the first time it happened he ran the front slide out and in, then had the green travel light. The next time he went to use it, no travel light. He has set the distance to 3/16 inch. It was about 1/2 inch. Still no travel light. He was going to replace the switches, but they are nearly 300 dollars each. I am not sure how to test the switches. There is a red wire, white wire, and a black wire that comes from the cn12 plug. According to the operator manual that I have, the red is 12 volt +. The white wire is ground and the black wire is switched ground. My guess is that when the room is in the magnet activates the black wire ground, which would turn on the travel light. When it comes to computer things, I don't know how to troubleshoot, always afraid of doing more damage than help. The service manual that I have only covers the level system and not the slides. Any help would be greatly appreciated. Ron