My 1965 6 cylinder mustang coupe will not start. It has sat for 2 years and until recently I didn't have the time or money to finish restoring it. I changed the battery, starter relay, and starter, but the results are the same, when I turn the key over, nothing happens, no noise, no cranks, nothing. I am in a bit of a bind, I have to have it running in a couple of days I am moving away from the garage it's stored in.

 

Can you put a wrench or socket on the crankshaft and move it by hand? The engine may be seized.

 

If the engine was seized it would at least make a sound when the starter tried to engage.
Can you jump the solenoid to check the starter?
From there I would check the ignition wires to the solenoid. When you break it down you are dealing with wires from the ign switch to the solenoid and cables from the battery to the solenoid and then the starter.
On my 66 there is a connector for the harness on the firewall. Check that.

I suppose the ign switch could be bad, but I would check the cheap and easy stuff first. Do you own a multi meter?

 

Definitely make sure that the wiring is correct and functioning. I did an upper-end rebuild on my i6, and replaced the starter solenoid and some other stuff and moved some wires around under the hood and, when I was finished, she would not start (I think there wasn't any sound/movement). Anyway, it turned out the two small wires on the started solenoid were swapped and in the wrong place. So make sure the wiring is all good.

I would also do some voltage tests to see where power is/isn't where it should/shouldn't be when the key is on/off. But make sure you don't leave the key on (with the car off) for more than about a minute at a time as it could heat up and fry the ignition coil.

A multimeter will allow you to check voltages and to check resistance (for example, high resistance from one end of a wire to the other means it's cut/corroded)