Mopar Muscle Association UK

Posted: **Tue Oct 13, 15 9:52 pm**

I was told the below:

Does it ring true?

Well i went though this myself a month or 2 ago, there is a brown AND blue wire that goes to the ballast resister, and you will need them both hooked up or you'll do what I did and have 12 volts either when key is in "start" only or when key is in "run" only, man that messed me up big time. so yes IMO ditch the resister and hook your igntion up to both blue and brown wires that way you will have 12 volts in both keyed ignition positions.

Jon

Posted: **Wed Oct 14, 15 12:49 pm**

Pretty much...hence my earlier comment.

MrNorm wrote:secondly its a really handy way to get a signal to the MSD which is live during both start and run. The MSD just uses this as a logic signal pretty much, voltage is unimportant.

If you keep the ballast then you already have one wire (the original) that provides a signal in Start and Run. The fact that it is 12V during crank and ~9V (IIRC) during run makes ZERO difference to the MSD - it gets its power supply from the other red 12V wire.

Mopar Muscle Association UK

Ignition ballast/wiring query