70 Challenger, the brown wire.. where does it go?

[67Vette427]

I'm hooking up the new electronic ignition and in the existing wiring harness there was a brown wire hooked to the ballast resistor opposite the 12v pole/wire. Is that brown wire suppose to be hot? Maybe it is for the tach?

Please let me know if you know if it need to go to the ballast resistor 

Thanks

[Chryco Psycho]

the brown wire powers the coil , it also comes from the start position of the ign switch  , so it willl bypass the resister & give 12v to the coil while starting
 the blue/ yelow wire from the electronic ign needs to be tapped into the blue wire at the oppostie end of the resister , you need to connect blact to the - coil terminal ,& leave both brown wires in place 

[67Vette427]

Thanks Chryco, I figured you'd know. They have four different instructions for that ignition and no diagram. I wanted to be sure.

[67Vette427]

What's weird though is the blue wire/wht stripe is hot 12v w/ign to one side and the brown was on the opposite end with a solid blue that ran to the positve side of the coil. This side is being reduced through the resistor. 

[Chryco Psycho]

exactly
 the   12 v blue/white wire feeds 12 v when running , the brown wire feeds 12v only when starting , the blue wire to the + coil terminal [sometimes brown ] has 12v when starting & 8v running 

[67Vette427]

Thanks, that makes sense. Another question, one of the field clips to the alternator has a brown wire coming out of it. It is about 16" in length. Any idea to what that may go to?

This is a great help

[Chryco Psycho]

you should have 1 green & 1 blue wire to the alt feilds , so I assume the brown wire is attatched to the blue wire
 if so it has been added to the harness & was used as a 12v swtiched wire for an electric choke probably

[67Vette427]

Ah, Yes! That makes sense and its just about the correct length for a choke. It was just wrapped up in a coil and black tape when I got the car. Thank you Chryco!!    I can hear that starter engaging ...... varoom

[Chryco Psycho]

Cool ,maybe I will hear it too