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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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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 -
one of the duraspark module power wires is hot in run/crank.
coil wire is poor choiceLast edited by babywag; 02-12-2019, 07:38 AM.Tony
88 GW, 67 J3000, 07 Magnum SRT8 -
Thanks again BabyWag for the help, I will check for 12 volts at those wires once I get the battery in.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 boxComment
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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.Chuck McTruck 71 J4000
(Chuck McTruck Build Thread)
(8.1L swap questions - PerformanceTrucks.net Forums)
79 Cherokee Chief (SOLD, goodbye old buddy)
(Cherokee Build Thread)
11 Nissan Pathfinder Silver Edition 4x4
09 Mazdaspeed3 Grand Touring
00 Baby CherokeeComment
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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.Last edited by nograin; 02-21-2019, 08:02 AM.'85 Grand Wagoneer
360 727auto, NP229
body by beer (PO)
carries wood inside
no "wood" outside
My other car is a fishComment
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