On a standard Chrysler 70's ignition setup, what are the twin brown wires at the ballast resistor?
Is one for the CRANK and the other goes to the "+" side of the coil?

Thanks

As you know the one brown would be from the ign sw "ign2" start terminal. Can you trace out the other where it goes to? Does it look OE or added? What year/model are we working w?

It is definately OE or part of the aftermarket electronic ignition setup.
I have not traced it out. It gets buried inside of the harness.
70 Challenger with the electronic ignition upgrade.

Thanks

Is this a Y1 or similar harness for the electronic ign addition? EDIT mymopar is showing only 1 brown to the downstream end then a black wire from there to coil positive pri

It is the harness that came with the kit.

Thanks

I've never used an add on conversion harness so myself I'd have to see where the other brown wire goes to at the other end of the loom. Been trying to think what else needs full 12V in crank only & nothing is jumping out at me.

This is a picture of the area.

Definitely not OE, Yeah I'd have to either post if anyone knows that harness or eyeball the other end. What brand is it?

It is a MP kit and I will try and trace it down tonight.

I am tracking down an electrical issue after installing a MSD box. I left off this twin brown wire connector and the car still started. This means that the other brown wire that is wired into the MSD unit with my RUN (blue) wire is possibly the other end of this second brown wire.

Thanks again.

i've tried to track down what you have by looking at my roadrunner, my diagrams and the one for your car and i simply can't make heads or tails out of what you have. your gonna have to do like Robert said and track down the 'extra' wire. sorry

I am currently trying to feed my MSD box with the 12v for run and the 12v for crank. So I took my blue wire (run) and my single brown wire (crank) and connected them together. The engine started and idled but my battery voltage was jumping all over the place and my ammeter was jumping around on the + side of the gauge.
I then hooked up the two brown wires with the two above wires trying to fix the jumping voltage and both gauges acted the same as before.
This is why I am trying to figure out what these twin brown wires are for.
Tonight I made voltage checks on the blue/brown wires and I got 12v in CRANK and 12v in RUN just as I was expecting. What I was not expecting with the two brown wires was that they also showed 12v in CRANK and 12v in RUN.
Now I am more confused about the twin brown wires and what their purpose is.
If anyone knows why I am getting the voltage and ammeter gauges jumping around since I wired in the MSD box, that would be great news.

Thanks

why don't you just use the starter relay for your MSD (small red feed). that's where i'm getting mine from.

Mike,
I am talking about the RED wire for the original "+" coil shown in this drawing (up, by the coil).

Thanks

""I am talking about the RED wire for the original "+" coil shown in this drawing (up, by the coil).""

I am now second guessing what I have wired at this red wire. I wonder if I have too many wires at this connection.

What do you guys think should be wired at the "original + coil"?

Thanks

""From the blue ign1 (run) circuit, in addition the "point" of the ECU pentastar (all a 4 pin ECU needs) plus the alt blue field wire plus the blue "sense" wire to voltage reg and if elec choke (as I was advised (on here) use the white domino bakelite choke current resistor/shutoff)""

- Blue "RUN" wire which is the voltage regulator wire (done)
- Brown "START" wire (done)
- Alternator Blue wire (I do not have hooked up and it should have a tracer)

So it appears that I still need the Blue/Tracer alternator wire if I am understanding you correctly. Since the twin brown wires show 12v on both the START and the RUN, I am assuming that I can leave those off since I already have the START/RUN voltages from the brown and the blue wires.

EDIT:
I currently have the "A" and the "B" hooked up to the MSD box. Now I need to find the "C" wire.


Thanks

Thanks Robert.