Did some work on my 66 cylinder 200 this weekend. Car was turning over, but not firing. Here is what I have done. All of this while charger was on battery for jump

Replaced points, still not firing up.
Replaced condenser, still not firing up.
Replaced ignition coil, FIRED UP and Ran.
Turn car off.
Went to start again, Nothing, no response whatsover. Headlights would not come on either.
Battery was old and weak so I replaced with new, prayer, turned over key. Nothing, not even turning over without fire at this point. Still no headlights.

Anyone have thoughts?
Thanks in advance.

 

Check your ground.

If your not getting the headlights to turn on after installing a new battery that would be the first step.

Does the radio power up or any other interior lights?

 

will do. just seems odd that it would start once, with old battery, then go to nothing. I will check the ground though.

 

As rst08tierney pointed out, the ground is most likely the problem. As a matter of fact, most electrical problems our cars have are due to bad or corroded grounds.

Check your battery cables for corrosion and examine the other end of the ground cable. Also, take a look at the ground strap that goes between the passenger side cylinder head and the firewall.

Check each cable and wire attached to the starter solenoid.

You have two grounds on the radiator support. Check those too while you are checking grounds.