Popping fuses as soon as you put them in?

[Jef]

If you find you have an issue where fuses are popping right away, here is a dinky tip for a temperary fuse replacement so you are not wasting a lot of fuses while tracking down the problem:

 

[smokey08]

These are also good for finding parasitic drains on older cars. Picture is slightly misleading, It will not work if you solder the wires as pictured.

 

[Uwe]

As drawn, the two filaments would end up in series, no?

-Uwe-

 

[Eric]

Did somebody do the math on the min fuse size this can replace without setting the wiring behind it on fire?

 

[golfi_vend]

Did somebody do the math on the min fuse size this can replace without setting the wiring behind it on fire?

I'm teached that bulb wattage should match estimated circuit wattage.

 

[Uwe]

Well, if it's a 24 watt bulb, full drop across it (i.e. a dead short in the wiring) would flow about 2A, right?

-Uwe-

 

[Eric]

Yup, so don't use in place of a 1A fuse Dead shorts aren't that uncommon. That reminds me of a friend who graduated from the same class as me, and decided it would be a good idea to force a breaker that kept popping, after he replaced his dishwasher, in the ON position. That did not end very well

 

[Uwe]

That may be why the diagram shows those filaments in series? A 7w filament and a 24w filament in series will draw something on the order of 1/2 an amp.

And dropping a crow-bar in place of a fuse is a time-tested way of finding the short -- it's wherever the smoke is coming from.

-Uwe-

 

[smokey08]

As drawn, the two filaments would end up in series, no?

-Uwe-

I get it now. They are both linked by the metal cap where they normally earth.