Low charge to no charge issue pulling hair out
Cleaned this up a bit.
The fact there is a drop at the fuse box when everything should be off tells us something must be drawing power.
Pressure (voltage) only drops when current runs through resistance. No current flowing, then there is no resistance.
So something is on. It might only be the dome light. It could be a radio, but since the Alt is a the same voltage as the bat, I don't think its a bad diode in the alternator. Rather its something that is on a fused circuit.
I tried helping someo ne else on FABO with an e-body a few years ago and he too seemed to have an issue like this. The fusebox is different than a-body boxes and without being there I couldn't help him track it down.
If its not the dome light, but the trunk light or some other item that should be off, it s probably the reason the battery got run down.
Cleaned this up a bit.
The fact there is a drop at the fuse box when everything should be off tells us something must be drawing power.
Pressure (voltage) only drops when current runs through resistance. No current flowing, then there is no resistance.
So something is on. It might only be the dome light. It could be a radio, but since the Alt is a the same voltage as the bat, I don't think its a bad diode in the alternator. Rather its something that is on a fused circuit.
I tried helping someo ne else on FABO with an e-body a few years ago and he too seemed to have an issue like this. The fusebox is different than a-body boxes and without being there I couldn't help him track it down.
If its not the dome light, but the trunk light or some other item that should be off, it s probably the reason the battery got run down.