DC-DC Charging ?
When you add a DC-DC charger from the truck as in several threads about that, does that put the house batts in parallel with the engine batt? (as with normal "alternator charging" via 7-pin) Or is...
Forum Discussion
Easy as pie to check quiescent draw in the chassis battery but you need to follow directions :)
Connect a DIGITAL WIRE ammeter from the negative battery post. The post. To the engine block.
Lift the negative battery cable from the post leaving the ammeter connected.
The digital ammeter reading you see is the correct RAM PRAM DRAM reading draw.
If you disconnect the ground cable first, it wipes the ECU and BCU and renders a WRONG reading.
This mode should preserve processor units memories. Sometimes a 3rd hand to lift the cable makes it easier. Sometimes it's easier to do this where a single negative connects to the engine.
Multiply milliamps by time. to reveal fractions or whole amp hour depletion.
Depletions are CYCLES. Aggravated by depth of discharge AND length of discharge.
Connect a DIGITAL WIRE ammeter from the negative battery post. The post. To the engine block.
Lift the negative battery cable from the post leaving the ammeter connected.
The digital ammeter reading you see is the correct RAM PRAM DRAM reading draw.
If you disconnect the ground cable first, it wipes the ECU and BCU and renders a WRONG reading.
This mode should preserve processor units memories. Sometimes a 3rd hand to lift the cable makes it easier. Sometimes it's easier to do this where a single negative connects to the engine.
Multiply milliamps by time. to reveal fractions or whole amp hour depletion.
Depletions are CYCLES. Aggravated by depth of discharge AND length of discharge.
