News:

It appears that the upgrade forces a login and many, many of you have forgotten your passwords and didn't set up any reminders. Contact me directly through helpmelogin@dodgecharger.com and I'll help sort it out.

Main Menu

Wire that is hot in start and key on position

Started by BLK 68 R/T, June 03, 2015, 12:02:39 AM

Previous topic - Next topic

BLK 68 R/T

I am in the process of putting all the wiring in my dash and trying to find a good place to tie in my F.A.S.T EFI 12v switched wire, it has to be hot when the ignition is in the start position as well as in the on position. I will be running a one wire alternator and completing the amp gauge bypass. There will not be a ballast resistor or voltage regulator due to the one wire alternator and MSD ignition. Checking the ignition switch there is a brown wire and a dark blue wire that both go out to the ballast resistor according to the factory diagram. Doing some continuity checks on the switch it appears that ignition 1 position is hot with the key on, and ignition 2 is hot when you turn all the way to start. In start ignition 1 looses continuity though, and ignition 2 has no power in on position. I am thinking that pulling the ignition 1 and 2 wires out of the back of the bulkhead and connecting them together and then connecting my 12v switched source there will give me the switched, but still hot in start position power supply that I need. Just looking for some second opinions or other ideas. Thanks everyone.

Wes

John_Kunkel


Connect the brown and blue wires together and use this to power the small red MSD wire.
Pardon me but my karma just ran over your dogma.

BLK 68 R/T

Thanks for the reply. Just to clarify, connecting the blue and brown wire will create a source that is switched as well as powered during starting for the EFI wiring. I will have to look at the wiring diagram for the MSD and see if it requires the same hot during key on/start as well.

Dino

I did something similar; I removed the ballast resistor and the wiring and mated hot and key on hot under the dash so they went into the bulkhead connector as one.  From there I ran a new wire to the coil.  You can do something like that with no issues.
Extraordinary claims require extraordinary evidence.

John_Kunkel

You bypassed the ballast and ran the mated wire to the coil? Or to the MSD?

MSD does require switched power in both Start and Run; most of their wiring diagrams don't take into account Mopar's IGN1 and IGN2 circuits, that's why IGN1 and IGN2 need to be spliced together to power the MSD.
Pardon me but my karma just ran over your dogma.

BLK 68 R/T

Thanks all for the replies  :2thumbs:

I think what I am going to do is this: Connect the 2 sets of original ballast resistor wires together, this creates a wire that is hot in start and key on. I can then use the original blue + wire for the coil to connect to the MSD switched 12v wire. Connecting the 2 sets of ballast resistor wires also makes the original 2 wire connection to the voltage regulator hot in start and key on as well so I can use that one to hook the EFI 12v input wire to, since I do not need the ballast or the voltage regulator for the one wire alternator.