When it was initially connected to two batteries, and the black wire grounded (batteries share chassis ground), the status light would blink. The device never did work and now the blue indicator never blinks.
Currently, one battery is 12.9 volts, the other is 13.0 volts. The black wire is grounded, and the red wire is open. The connector on the pigtail is firmly pressed into the socket.
Does the blue light being off (I have watched it for minutes, it does not blink) mean the device has failed ?
