MSD ignition wired directly to battery. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Lance-ftw · 10-11-2010, 11:57 AM

Is this a problem?

I can't find a good isntallation manual online but my MSD ignition system is powered directly from the battery (assuming that means it's always hot) is this proper, and if not proper is it dangerous in any way or bad for the ignition/truck/starving pygmies in guam?

I figure it should be on ACC power and not full 12v constant but I'm not sure so I figured I'd come here and ask

Thanks in advance for the help.

Gobbles · 10-11-2010, 12:52 PM

Not sure which model you have, but here are some schematics for the 6 series. The few I looked at all have a hot going directly to the battery.

http://www.msdpower.com/support/inst...p?cat=download

grs · 10-11-2010, 05:54 PM

I think it should be hot with the key on. Not hot all the time.

71 super · 10-11-2010, 06:08 PM

I have had both the 6 and the 7 series and both were wired directly to the battery per the manufacturers instructions.

**SactoJim** · 10-11-2010, 06:28 PM

I believe there is a wire that does go to battery and another trigger wire you wire to your ignition switch. Nice little semi-theft deterrent is to run a toggle switch or similar in line with the ignition wire and put it within reach but out of site.

**El Jay** · 10-11-2010, 07:02 PM

The 6 series box is supposed to be wired directly to the battery, both the hot and the ground sides; so says MSD in their instructions.

For my bona fides, I have a 6 series box on my '69.

aintmisbehavinn · 10-11-2010, 08:07 PM

I jumped mine off the fuse block on the side, works perfect and it's inches from the battery. The positive wire running from the postive lead to the box is easy and no splicing or cutting, no wire to fall off when you disconnect. Take the white wire from the box run into a hidden place an wire to toggle switch for on off to disable ignition. Mine is hidden away along with a fuel cut off. One excellent benefit of MSD and you can't jump any wire to the starter or coil, you won't have ignition unless you can figure out were it grounds which will buy you time.

10-11-2010, 11:57 AM	#1
Lance-ftw Registered User Join Date: Sep 2010 Location: Fort Worth, Texas Posts: 143	MSD ignition wired directly to battery. Is this a problem? I can't find a good isntallation manual online but my MSD ignition system is powered directly from the battery (assuming that means it's always hot) is this proper, and if not proper is it dangerous in any way or bad for the ignition/truck/starving pygmies in guam? I figure it should be on ACC power and not full 12v constant but I'm not sure so I figured I'd come here and ask Thanks in advance for the help.

10-11-2010, 12:52 PM	#2
Gobbles Registered User Join Date: Sep 2010 Location: British Columbia Posts: 484	Re: MSD ignition wired directly to battery. Not sure which model you have, but here are some schematics for the 6 series. The few I looked at all have a hot going directly to the battery. http://www.msdpower.com/support/inst...p?cat=download __________________ Trevor "You already said spite"

10-11-2010, 05:54 PM	#3
grs Registered User Join Date: Jan 2010 Location: Roanoke, Tx. Posts: 1,561	Re: MSD ignition wired directly to battery. I think it should be hot with the key on. Not hot all the time.

10-11-2010, 06:08 PM	#4
71 super Registered User Join Date: Sep 2005 Location: Canton North carolina Posts: 3,080	Re: MSD ignition wired directly to battery. I have had both the 6 and the 7 series and both were wired directly to the battery per the manufacturers instructions. __________________ 67 blue step side- bb 68 gold and white swb cst anniversary 68 custom swb hot rod Ls swap 69 swb cst 6 cylinder/ overdrive 69 black/black cst bb swb 70 orange and white cst Canada built truck swb bb 71 black and white super swb bb 71 red and white super swb 72 green and white super swb 4x4 62 nova wagon 400 series Ls swapped 68 Camaro 327/4 speed- 1 owner, original paint 66 Volkswagen bettle 69 auto stick Volkswagen Beetle

10-11-2010, 06:28 PM	#5
SactoJim Registered User Join Date: Oct 2005 Location: Sacramento, CA Posts: 1,970	Re: MSD ignition wired directly to battery. I believe there is a wire that does go to battery and another trigger wire you wire to your ignition switch. Nice little semi-theft deterrent is to run a toggle switch or similar in line with the ignition wire and put it within reach but out of site. __________________ 72 Cheyenne SWB Fleet Nut & bolt frame off in progress...99.9999% - supercharged 383 - 4 wheel discs - relocated fuel tank - My Build Thread

10-11-2010, 07:02 PM	#6
El Jay Gone to greener pastures Join Date: May 2007 Location: Gateway to the Delta Posts: 7,354	Re: MSD ignition wired directly to battery. The 6 series box is supposed to be wired directly to the battery, both the hot and the ground sides; so says MSD in their instructions. For my bona fides, I have a 6 series box on my '69. __________________ '69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck

10-11-2010, 08:07 PM	#7
aintmisbehavinn Registered User Join Date: Dec 2008 Location: Lawrenceville GA Posts: 64	Re: MSD ignition wired directly to battery. I jumped mine off the fuse block on the side, works perfect and it's inches from the battery. The positive wire running from the postive lead to the box is easy and no splicing or cutting, no wire to fall off when you disconnect. Take the white wire from the box run into a hidden place an wire to toggle switch for on off to disable ignition. Mine is hidden away along with a fuel cut off. One excellent benefit of MSD and you can't jump any wire to the starter or coil, you won't have ignition unless you can figure out were it grounds which will buy you time.

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