On Mon, 20 Jan 2020 20:21:00 +0000, Robert wrote:

To help with the elimination process try running the dashcam from a USB
backup battery.

Well I suppose it isolates the camera from the car but there is still
a DC-DC convertor in the "USB battery". Doesn't really help in
tracking down the source of the problem as you've changed more than
one thing.

--
Cheers
Dave.