Re: MSD 6AL key on voltage connection
[Re: 87MO DAK]
#955208
03/21/11 03:27 PM
03/21/11 03:27 PM
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Joined: Aug 2007
Posts: 6,096 Valencia, España
NachoRT74
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Valencia, España
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actually with a good power coming from alt and healthy wiring, the B+ source it can be wired from alt post too
the KEY source it can be the blue wire ( brown in 70 and lates ) going from ballast to coil.
Or if thinking on remove ballast resistor, then use the blue wire ( all years ) originally feeding ballast and regulator
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: MSD 6AL key on voltage connection
[Re: 87MO DAK]
#955209
03/21/11 03:31 PM
03/21/11 03:31 PM
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Joined: Jun 2003
Posts: 21,447 It's a dry heat
gtx6970
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Quote:
The trigger wire (small red ) just needs a 12 volt key on hot wire , to tell the box to switch on.
Any suggestions as to what circuit to get the key on signal from ?
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Re: MSD 6AL key on voltage connection
[Re: MarkZ]
#955213
03/22/11 01:58 AM
03/22/11 01:58 AM
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Joined: Jan 2003
Posts: 9,826 las vegas
70AARcuda
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just remember the msd start switch will need to see 12 volts both went the key goes to start and went the key is on run...
some 12 volt circuits go to zero volts went the key goes to start...
take the two wires from the ballast resistor...run and start ...and connect both wires to the msd start switch...
Tony
70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: MSD 6AL key on voltage connection
[Re: 70AARcuda]
#955214
03/22/11 10:57 AM
03/22/11 10:57 AM
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Joined: Jun 2003
Posts: 21,447 It's a dry heat
gtx6970
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Quote:
take the two wires from the ballast resistor...run and start ...and connect both wires to the msd start switch...
This is what I'm going to do . Plan is to remove the 2 male spade connectors from the bulk head connector and wire the MSD box into both pinouts on the connector. That way should the desire to remove all the hotrod stuff arise and put it back to stock. I want it to be as simple and painless as possibile
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Re: MSD 6AL key on voltage connection
[Re: gtx6970]
#955216
03/22/11 11:32 AM
03/22/11 11:32 AM
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Joined: Dec 2010
Posts: 115 NY,Poughkeepsie
87MO DAK
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Quote:
Quote:
take the two wires from the ballast resistor...run and start ...and connect both wires to the msd start switch...
This is what I'm going to do . Plan is to remove the 2 male spade connectors from the bulk head connector and wire the MSD box into both pinouts on the connector. That way should the desire to remove all the hotrod stuff arise and put it back to stock. I want it to be as simple and painless as possibile
If the car is still wired the way it cam factory , (main feed off alt through the bulk head to the amp gauge then back out of the bulk head to starter relay or batt?) You will still be in line with the alt.
What MSD is saying for the box to work the way it should, is that it needs to be hooked to the battery POS&NEG only and no where else.The battery will filter out most of the noise in the system . If you wire it up any other way you could have erratic idle problems, Fouling plugs ,remember the MSD box feed's the coil all it's power.
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Re: MSD 6AL key on voltage connection
[Re: gtx6970]
#955218
03/22/11 12:00 PM
03/22/11 12:00 PM
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Joined: Dec 2010
Posts: 115 NY,Poughkeepsie
87MO DAK
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Quote:
But if I use the original coil pos connection to supply key start/on voltage signal it's using the ballast resistor .
Running it thru the ballast resistor and I tend to think this is abad idea , correct ? UNLESS I run a solid wire to bypass it on the backside of the ballast.
It is a MSD dist btw, combined with an MSD blaster 2 coil.
And yes, all the cars body wiring is still stock. One of my goals here is to be able to return it back to stock with minimul effort should the desire to arise sometime in the future.
It should be easy then , hook the main POS & NEG from the MSD box directly to the battery. Hook the smaller red wire to the blue wire on the ballast but hook it up on the same side as the feed ,so if you want to remove it ,it should be pretty simple ,and that way it is not feeding through the ballast.
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Re: MSD 6AL key on voltage connection
[Re: NachoRT74]
#955219
03/23/11 03:09 AM
03/23/11 03:09 AM
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Joined: Aug 2007
Posts: 6,096 Valencia, España
NachoRT74
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Posts: 6,096
Valencia, España
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Quote:
Quote:
the KEY source it can be the blue wire ( brown in 70 and lates ) going from ballast to coil.
Or if thinking on remove ballast resistor, then use the blue wire ( all years ) originally feeding ballast and regulator
when I made this quote it was because forgot to add ( twice ), if removing ballast, NEED to splice together brown and blue wires coming from bulkhead to hook there the small red wire of MSD. If not remove the ballast wire going originally to coil is simply enough. Its just a trigger to turn it on, not a power source
Noises on system are actually produced from COIL on stock system, breaker points &/or mechanical regulators, not really the alt, but whatever! Follow the instructions going to batt or starter relay stud. Just take in mind SOME of the ammeter reading can it be some mismatched with the real status
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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