Still getting voltage on circuit with fuse removed?!?!?

Thanks for the replies. All good ideas and the general circuit diagram is very helpful.

The LEDs that show a blow fuse work as long as there is a load on the circuit. That makes sense. If there's no draw, there's no current.

I am working with the converter manufacturer on a different issue and they claimed that you will still get current when a fuse is blown. I'm still trying to wrap my head around that one but does anyone want to check their own? Yank the fuse on a circuit with a multimeter attached. I used a light fixture, multimeter probes held in the bulb socket by themselves.

Some thing is back feeding that circuit, click off each breaker or pull each fuse until the voltage is removed, that is the circuit that is back feeding this circuit.

Some times you will have a screw shorting a circuit with high resistance , and will seek ground any way it can back to the battery.

Both the on-board converter/charger unit and the trailer batteries feed the same 12VDC POWER DISTRIBUTION PANEL. These are the only two sources for power unless you have a solar panel installed.

Here is a simplified 30AMP Wiring configuration for the trailer...


Seems strange if the 12VDC fuse is pulled you would be getting DC VOLTAGE on the load side of the circuit.

If you are referring to the LED LIGHT that comes on when a fuse is blown it is powered from a diode on the primary side of the fuse.

Roy Ken

Easy! Look very closely at all of the fuse connections, you will likely find a wire strand from a neighboring fuse touching the circuit in question.