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Old 02-11-2019, 10:10 PM
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Full Size Jeeper Full Size Jeeper is offline
304 AMC
 
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Location: Mandeville Louisiana
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Need help with wiring for my MSD 6AL box

I need a 12 volt source to power the MSD box on and off such as an ignition switch. can I use the hot wire off the factory coil or one of the wires that connected to the factory distributor? I don't have my main cables in yet, so no way to hook up a battery yet, what wire would be best for that. Thanks in advance, Darin.
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401/turbo 400 trans. Quadra-Trac BW1339 (with Low) 4" Rusty's lift with 31" Summit Mud Dawgs

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Old 02-12-2019, 09:25 AM
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babywag babywag is offline
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one of the duraspark module power wires is hot in run/crank.
coil wire is poor choice
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
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Last edited by babywag : 02-12-2019 at 09:38 AM.
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Old 02-12-2019, 11:26 AM
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Full Size Jeeper Full Size Jeeper is offline
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Thanks again BabyWag for the help, I will check for 12 volts at those wires once I get the battery in.
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1978 Wagoneer

401/turbo 400 trans. Quadra-Trac BW1339 (with Low) 4" Rusty's lift with 31" Summit Mud Dawgs

Mods:
Fuel Tank, Red Holley Fuel Pump, Razor Grill (profile pic out dated), Rebuilt steering box
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Old 02-21-2019, 12:23 AM
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rang-a-stang rang-a-stang is offline
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I’m pretty sure It’s the fat red with white stripe wire. The other wire (blue I think) has the start/crank signal on it.
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Old 02-21-2019, 09:57 AM
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nograin nograin is offline
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What's wrong with the ignition wire to the coil?
The on/off just powers an internal relay - doesn't draw much and doesn't even need full voltage.



Illustration on the later pages should show the original ignition wire gets removed from the coil positive. The box may even have an isolator tab with connectors. They used to come in the package.
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Last edited by nograin : 02-21-2019 at 10:02 AM.
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