I have a starting issue. My car will sometimes die while idling and when you turn the key, nothing. It will not crank. When this happens the fan will go on high speed. It does not seem overheated. Other times I will turn it off and then again nothing. After it sits overnight, it starts right up. Any ideas on where to start?

 

no start and high speed fan point to engine relay in the RCM.

 

I sent it to D.J.