I learned some additional methods for determining how much current is drawn by a given circuit. Rand Ash (the Ultimate NAG52 guy) gets credit for the idea of putting a jumper in and measuring that with the clamp DC ammeter (why didn’t I think of that?). While the voltage drop trick is helpful for seeing where there is current draw, the jumper and ammeter method is great for determining exactly how much current is drawn.
Rand Ash also thought that my CAN bus was staying awake, and I wound up proving him right. I discovered that the cause was a cheap audio converter I was using to inject sound into the car's MOST optical loop. The device allowed me to use the car's stock amp. The problem is that the use of cheap one was keeping the MOST loop active, which in turn was keeping the CAN bus awake.
I switched to a name-brand Xtrons optical converter unit (part number FOBB01), and now the MOST optical loop and the CAN bus shut down correctly. Current draw now drops to 0.05 amp when the car has been off for a while.
In the video I also show the installation of a DC/DC converter underneath my ash tray to power my phone. I think it’s the perfect place to put it!
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Music Credits:
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