I thought I was smart and put an LED across some of the fuses om my RV4. The idea being that if the fuse blows, there will be a very slight current flowing lighting the LED.
On Saturday I had what appeared to be a dead flat battery so I removed the battery, took it home and charged it. All good 13 plus Volts and reinstalled it on Sunday. Still appears dead flat.
I have a manual master switch at the battery and another master on the panel, which feeds several buses. I couildn't see a lit LED and I got a multimeter to read 13V at the input to the fuse and also at the output from the fuse and at the main bus, but to all intents the battery was dead.
3 hours of nutting it out and looking for a fault before I removed the fuse and would you believe it was blown, looked good but no continuity.
I was reading volts at the bus, but it was the miniscule current coming through the LED that I was reading.
I still think it is a good idea to parallel the fuse with a LED, but they are hard to see in bright sun and will allow current flow.
On Saturday I had what appeared to be a dead flat battery so I removed the battery, took it home and charged it. All good 13 plus Volts and reinstalled it on Sunday. Still appears dead flat.
I have a manual master switch at the battery and another master on the panel, which feeds several buses. I couildn't see a lit LED and I got a multimeter to read 13V at the input to the fuse and also at the output from the fuse and at the main bus, but to all intents the battery was dead.
3 hours of nutting it out and looking for a fault before I removed the fuse and would you believe it was blown, looked good but no continuity.
I was reading volts at the bus, but it was the miniscule current coming through the LED that I was reading.
I still think it is a good idea to parallel the fuse with a LED, but they are hard to see in bright sun and will allow current flow.