The ac doesn't work. the compressor doesn't come on. The light on the dash does. After looking at the electrical diagram I am confused. Any help

 

Sounds like you are low on freon and the low pressure switch will not allow the clutch engage. As that keeps it from burning up the compressor. If you do have enough freon in the system let me know and we can go from there. Also could be the relay but I think from what you have said it sounds like freon.

Hope this helps.