9) Do not remove any fuses as you may wake the networks. Instead set voltmeter to 200 uV scale and check for voltage drop across each live fuse.

200 uV?

Other than that, I agree. Meters in ammeter mode may insert a large resistor. it would be easy to fry the meter in the 300 mA range. A large wattage resistor is much safer.

I said earlier to check your meter in the current range you were using with a battery and resistor.

 

200 uV?

Other than that, I agree. Meters in ammeter mode may insert a large resistor. it would be easy to fry the meter in the 300 mA range. A large wattage resistor is much safer.

I said earlier to check your meter in the current range you were using with a battery and resistor.

200 uV... measuring the voltage difference across the fuse terminals which is essentially your large resistor.

 

200 uV... measuring the voltage difference across the fuse terminals which is essentially your large resistor.

Here is a URL of the method with the table: https://us.autologic.com/news/testing-parasitic-draw-via-fuse-voltage-drop

Most meters don;t have a 200 microVolt scale. 200 millivolt is likely.

I do have this http://www.testequipmenthq.com/datasheets/KEITHLEY-195A-Datasheet.pdf meter with a 100 nV resolution and a 20 mV range. I also have a Keithley 181 nanovoltmeter https://accusrc.com/uploads/datasheets/4828_181.pdf which has a 10 nV resolution/ A run of the mill meter won;t do that.

A fuse is a very low value resistor.

 

Here is a URL of the method with the table: https://us.autologic.com/news/testing-parasitic-draw-via-fuse-voltage-drop

Most meters don;t have a 200 microVolt scale. 200 millivolt is likely.

I do have this http://www.testequipmenthq.com/datasheets/KEITHLEY-195A-Datasheet.pdf meter with a 100 nV resolution and a 20 mV range. I also have a Keithley 181 nanovoltmeter https://accusrc.com/uploads/datasheets/4828_181.pdf which has a 10 nV resolution/ A run of the mill meter won;t do that.

A fuse is a very low value resistor.

After I wrote that I kind of thought I may have misunderstood your comment... I've actually used this method a few times myself. I can only to mV myself, but I'm thinking most times it will be good enough. Another thought... fuses have wide manufacturing tolerances in the automotive world and it's not always going to be a perfect number for a conversion. It will give a good estimate, but you'll have to test individual fuses to get their real resistance before relying on your calculations.

 

When your generally looking for zero or some number, it doesn't really matter what the number is. It gives you a place to start.

When i was doing measurements of conductivity. 2e15 Siemens was the same as 6e15 Siemens. if it were dollars, they would be very different numbers. Sometimes, for instance zero is a very difficult number to "measure".

I can argue that a piece of wire in mid air generates a current. It is a wire in the earth's magnetic field which is rotating, therefore physics says a current is generated. It's called the triboelectric effect. It actually affected the measurements I had to make.

Aside: I had a couple of cases of the intermittent fuse. yuk.

It might be easy to determine by tests if a female is pregnant, but not easy to tell she isn't.

Another aside:
I had a fight with the water company and the state department of transportation about a water leak in the road. They were blaming it on each other as to whose responsibility it was. the water company said there was no chlorine in the water, therefore not their problem. the water company tore up the road about 100 feet from the actual emergence of water. In 24 hours chlorine is gone in an open container. This leak went on for more than a year.

 

check your battery first at autoparts store.