Car wont start

Start with checking all grounds,I just had a similar problem.My car wouldn,t start by the key,I could jump at the starter relay and it would run.I traced power to my ignition and in my block of wires,my wire was loose in the block(worked on and off when wiggled)Now my car is a 66 Dart(90,000 miles)no rust,but it,s old and the wiring is getting hard and brittle.Trace back over your re-install of your electrical and check for bad connections(cracks,corrodded connectors..??)Hope you find it! Ialso have been sick for 2 weeks.Flu like broncios symtems,SUCKS!!