Was running but now after pulling alternator wire, it won’t run
Not sure why you want to look for power draw, but you can use the battery power and the ammeter.
Engine off is all that is needed to take the alternator out of the equation.
Ammeter should show zero discharge. If it shows discharge, then something is drawing power.
Open the door for example and watch the ammeter as the dome light turns on.
The only things it won't show are the starter and starter solenoid and the MSD draw if the MSD's power feed (heavy red wire) is connected at the battery positive or starter relay junction.
If there is no discharge with key off, then you could put the key into accessory and see if anything is drawing. That will cover all the circuits except those needed to run the engine.
1969 Power circuits were like this
I suggest piggybacking the MSD on/off wire to one of the ballast resistor terminals. It doesn't really matter which one, but they suggested the Ignition run side.
Make sure the ignition run circuit has good connections to the voltage regulator ignition terminal as well as the ballast resistor.
You can connect the MSD power to either the battery positive circuit or the alternator output circuit. Alternator output line will keep the ammeter reading correctly. In my experience with an older MSD 6T this works fine.
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Ballast resistor is irrelevant to the MSD 6 series.
Not sure why you want to look for power draw, but you can use the battery power and the ammeter.
Engine off is all that is needed to take the alternator out of the equation.
Ammeter should show zero discharge. If it shows discharge, then something is drawing power.
Open the door for example and watch the ammeter as the dome light turns on.
The only things it won't show are the starter and starter solenoid and the MSD draw if the MSD's power feed (heavy red wire) is connected at the battery positive or starter relay junction.
If there is no discharge with key off, then you could put the key into accessory and see if anything is drawing. That will cover all the circuits except those needed to run the engine.
1969 Power circuits were like this
I suggest piggybacking the MSD on/off wire to one of the ballast resistor terminals. It doesn't really matter which one, but they suggested the Ignition run side.
Make sure the ignition run circuit has good connections to the voltage regulator ignition terminal as well as the ballast resistor.
You can connect the MSD power to either the battery positive circuit or the alternator output circuit. Alternator output line will keep the ammeter reading correctly. In my experience with an older MSD 6T this works fine.
More in this post
