Is it time to dump my old Guest charger?

[RSB333]

While checking for a "ground leak" I found 1.37v coming through the positive feed cable of my old Guest two-bank battery charger. The charger was turned off (unplugged), so the voltage must have been coming from the house bank, through the charger circuitry to the starting battery. Is this an indication that the diodes that separate the two banks have died? RSB

[s57ra]

The presence of the voltage does not mean there is a leak. You should measure the current, not the voltage. Connect a load (resistor, light..) in series with the amp-meter and see what happens.

[smac999]

It's probably just the caps in the charger still charged. If you grounded it , it would probably disappear after.

Disconnect a stereo, chart plotter etc. And you probably measure volts on them too

[RSB333]

Thanks, will try both suggestions.
Cheers! RSB

[Cadence]

Originally Posted by RSB333

While checking for a "ground leak" I found 1.37v coming through the positive feed cable of my old Guest two-bank battery charger. The charger was turned off (unplugged), so the voltage must have been coming from the house bank, through the charger circuitry to the starting battery. Is this an indication that the diodes that separate the two banks have died? RSB

A schematic would help. Diodes generally fail open Ground leak what has been the charging problem?