TikZ-PGF – How to Shift the Current Path Up

Question

I'm trying to adap the answer here to add current flowing path to my circuit.
Unfortunately, the result is not same as in the reference above. I want to shift the current path up a bit.
How can I do that?

Does every node has all anchors such as north, south, east, west, north east, etc?
I saw this but couldn't make it works.

Also I would be much appreciated if you can help me change the arrow to something nicer. This \arrow{>=stealth} does not work as probably I don't understand how to use that.

\documentclass[border=1mm]{standalone} 
\usepackage[american,siunitx,RPvoltages]{circuitikz} 
\usetikzlibrary{decorations.markings} 
\usetikzlibrary{backgrounds}

\begin{document}

\begin{tikzpicture}

\ctikzset{ inductors/scale=0.5, capacitors/scale=0.5, sources/scale=0.5, switches/scale=0.5 }

\draw  (0,0) coordinate (start)  node[ocirc]{} to [cute open switch]
++(1,0)  to [cute inductor, l^=$L$] ++(1,0) to [short]++(0.5,0) node[ocirc]{} coordinate (end);


 % adding current \begin{scope}[on background layer, very thick, decoration = {
        markings,
        mark = at position 0.2 with {\arrow{>}}} ]  \draw[line width = 2pt, red!40, postaction = {decorate}] (start.north)--(end.north);   \end{scope}

\end{tikzpicture}


\end{document}

Answer 1

All nodes has anchors such as north, south, east, west, north east, etc. A coordinate as you use here has no size, so all the anchors are at the same location. It is better to use arrows from arrows.meta than the old ones (Notice Stealth not stealth).

\documentclass[tikz, border=1cm]{standalone} 
\usepackage[american, siunitx, RPvoltages]{circuitikz} 
\usetikzlibrary{decorations.markings, arrows.meta} 
\usetikzlibrary{backgrounds}

\begin{document}

\begin{tikzpicture}
\ctikzset{inductors/scale=0.5, capacitors/scale=0.5, sources/scale=0.5, switches/scale=0.5}
\draw  (0,0) coordinate (start)  node[ocirc]{} to [cute open switch]
++(1,0)  to [cute inductor, l^=$L$] ++(1,0) to [short]++(0.5,0) node[ocirc]{} coordinate (end);
\begin{scope}[on background layer, decoration={
markings, mark=at position 0.2 with {\arrow{Stealth[scale=0.8]}}} ]  
\draw[ultra thick, red!40, postaction={decorate}] ([yshift=1pt]start) -- ([yshift=1pt]end);   
\end{scope}
\end{tikzpicture}
\end{document}

Or as in comments:

\draw[ultra thick, red!40, postaction={decorate}, transform canvas={yshift=1pt}] (start) -- (end);