I am a new user of the Chilton DIY manuals.  The access to wiring schematics is great, but I don't understand all the references and can't find a reference key. For example, C200 references a connector, but what does S213 reference?  Also, wires are have labels like 3RED 242.  I understand it is a red wire but don't know what the numbers refer to.  I anyone can help me it would be very much appreciated.