Yes, your alternator is the culprit as the engine is running on battery power. Before you purchase a new one, though, take it to your local Autozone, Pepboys, Checker, or the like and have them test it. They will do it for free. I take it since you didn't say the steering became hard, that the serpentine belt is still running correctly. If it was difficult to steer, this would be the issue.

Please advise on check gauges light on and battery gauge reads zero
I have a curved path that I want to put an open diamond arrow tip on.  Here is a MWE with my best attempt:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{arrows,decorations.markings}
\begin{document}
 \begin{tikzpicture}[decoration={
   markings,
   mark=at position .5 with {\arrow[&gt;=open diamond] {&gt;} } }
  ]
  \node (0)                     {};
  \node (1) [right       of=0]  {};
  \node (2) [below right of=1]  {};
  \path (0) edge[out=0, in=135, postaction={decorate}] (2);
 \end{tikzpicture}
\end{document}




As you can see, the bottom-right point of the diamond is perfectly on the path, but the top-left point is clearly above the path.  It appears that the diamond lies on the tangent line of the path at the bottom-right point of the diamond.

Question:

How can I place this open diamond arrow tip so that both points of the diamond are on the path?

Bonus Question:

What is the best solution to make the area inside the diamond completely white? I don't want to see the path in the inside of the diamond.  I currently have a solution that I feel is a hack, which is to place a white (closed) diamond arrow tip in the same spot first:

mark=at position .5 with {\arrow[&gt;=diamond, white] {&gt;} },

