IGN. SWITCH

-

WAYNE0

Well-Known Member
Joined
Oct 16, 2019
Messages
1,096
Reaction score
1,087
Location
milton pa.
Here is a question i think i know the answer to but i just want to confirm it. When i start my barracuda it will not fire until i let go of the key. Im thinking my new switch is bad already.
 
Here is a question i think i know the answer to but i just want to confirm it. When i start my barracuda it will not fire until i let go of the key. Im thinking my new switch is bad already.
What year? Electronic ignition? That sounds like a bad dual ballast resistor.
 
^^The above!!!

You need to learn to do some troubleshooting. All Mopars that we discuss on here have the ballast bypass circuit for starting and this is in the IGNITION SWITCH. Older Fords/ GM did this, but they used an auxiliary contact in the starter solenoid.

When you twist the key from "run" to "Start" the "ignition run" (IGN1 at the key) GOES DEAD. The only starting voltage when cranking is the IGN2 bypass circuit, which is a separate switch contact in the ignition switch for that purpose. It goes from the IGN2 terminal of the switch, to the coil + side of the ballast resistor.
 

Make sure the MSD box is getting power from both IGN1 and IGN2. They don't use a ballast resistor.
 
67 MSD ignition box & dist. The ballast resistor i just put on a few weeks ago.
Good to know
Make sure the MSD box is getting power from both IGN1 and IGN2. They don't use a ballast resistor.
Also good to know. It might help us from chasing our tails for a few pages before we find out the OP is running a MSD.
 
67 MSD ignition box & dist. The ballast resistor i just put on a few weeks ago.
OK, ****. MSD DOES NOT USE a ballast resistor. Is this the common MSD multispark CD box? They work COMPLETELY DIFFERENT than Mopar ignitions.

1...DO NOT connect ANYTHING to the coil EXCEPT the 2 wires direct from the MSD box.

(If you have a tach, research the tach and MSD and find out how you need to connect the tach, possibly with an adapter box)

2...See no1....DO NOT connect a radio suppression cap to the coil

3....The MSD has a "big black" and "big red." Connect those to a good ground (black) and the red (I would fuse it) full time battery. The starter relay stud might be a good place

4....Make sure you tape off the white, which is for points

5....The small red goes to your switched ignition. Take the blue from the ballast, along with whatever it was connected to and connect it to the other end of the ballast wires, which are probably brown and blue.

Now get the end of the original coil + wire and connect that to your small red.
 
But it also should not care if there is a ballast resistor.
All that has to happen is the small red wire get some power and the MSD will turn on.
1751558237041.png


Maybe the now common 1.5 Ohm + resistors are an issue. Not an issue with .5-.7 ohm resistors.

This is the basic setup
1751558084465.png


Since in this case its a MSD distributor, that connector will be different p/n.

Another way of connecting the on/off wire is making a junction at the ballast resistor.
1751558411925.png


1751574314516.png
 
Last edited:
Actually you are right and I've said this. What I SHOULD have said is, "it's not needed for operation."
 
Well, he hasn't been back, so maybe the fuckin MSD electrocuted his ***, and layin' on the ground out there.
 
"subtutley" Is that even a word? Sorry been a long ride home from Carlisle today! Seems you got drift anyways!
 
-
Back
Top Bottom