Grounding issues
 

I'm having some issues with my 07 base model. it's an 07 PT cruiser base model, 2.4l non turbo automatic. The issue is with grounds. so far I have added ground wires for the fuel level indicator, fuel pump, passenger side headlights (both hi and low beams), passenger side turn signals, and horn. I've checked all the chassis ground connections I can find and all seem to be connected properly. Is there a diagram somewhere that shows the grounding locations on the car? This thing is really starting to tax my brain.

Also, the small hose that comes off the fuel filler hose is not connected and is causing a P0455 code. What does that hose connect to. I can't see anywhere to plug it in to.

Thanks for any help, it would be greatly appreciated