73 barracuda tries to run only in the start position.

[Flathead31coupe]

So after a little bit of time, I finally got the new wine harness installed new ballast resistor new starter relay. And came the grand moment to start when I tried it , it lit off as i'm holding the key in the start position stopped when I let up.. I'm sure it's been discussed a lot of times.. The ballast resistor drops down the votage from one side to the other.And on the other spade clip, it stays the same voltage.The ballast resistor has four posts.. Thoughts are appreciated..

 

[tonysrt]

You're not getting 12 volts at the ballast resistor in the run position which drops it to about 6-8 volts. In the start position you should have more volts to the coil, 8-10 volts, when you are in the run position check voltage at the ballast, or you are not getting voltage from ignition switch. Also check volts at the coil in the run position. A voltmeter is a necessary tool to check this.

 

[Challenger RTA]

Brown is start run is blue.

 

[Flathead31coupe]

Ok thanks alot