Engine wiring
Here's the thing. Most ignition "run" feeds go dead during start. In factory Mopars this is called IGN1 or "ignition run."
ONLY in Mopars, the power during cranking is provided by the ballast bypass circuit IGN2. This comes from a separate contact on the ignition switch used only for that
On Fords, AMC, and GM the bypass function during start comes from the "I" terminal on the starter relay / solenoid.
So first thing you need to do is see if your GM "run" wire stays hot with key in "start." If not you have a couple ways to go..........
You'll need a starter relay anyway, because of the high current from the Mopar starter. You could use a late model "Jeep" starter relay which has an extra contact If you have an automatic trans, this might be the best way, as it also accomodates the Mopar neutral safety function
Or you could wire a big diode from the "S" solenoid wire over to the ignition system
Yet another way, if you don't have an automatic transmission, is use common Ford fender mount relay from the 70's. Use the key to fire the relay, use the big studs to feed the Mopar solenoid, and connect the "I" terminal to the new ignition system.
Here's the thing. Most ignition "run" feeds go dead during start. In factory Mopars this is called IGN1 or "ignition run."
ONLY in Mopars, the power during cranking is provided by the ballast bypass circuit IGN2. This comes from a separate contact on the ignition switch used only for that
On Fords, AMC, and GM the bypass function during start comes from the "I" terminal on the starter relay / solenoid.
So first thing you need to do is see if your GM "run" wire stays hot with key in "start." If not you have a couple ways to go..........
You'll need a starter relay anyway, because of the high current from the Mopar starter. You could use a late model "Jeep" starter relay which has an extra contact If you have an automatic trans, this might be the best way, as it also accomodates the Mopar neutral safety function
Or you could wire a big diode from the "S" solenoid wire over to the ignition system
Yet another way, if you don't have an automatic transmission, is use common Ford fender mount relay from the 70's. Use the key to fire the relay, use the big studs to feed the Mopar solenoid, and connect the "I" terminal to the new ignition system.
