Where can I get routing tutorial for Solidworks?
Right inside SolidWorks.
Open SolidWorks, look to the tabs on the right. Select the one that says 'SolidWorks Resources' - it looks like a house. Select Tutorials and a new window will open. In this window, under 'tutorials by category', select All SolidWorks Tutorials (set 2). You'll see Routing: Electrical and Routing: Pipes and tubes there.
I'm not sure what version the tutorial first appeared in, though.