Why did my 30A battery fuse blow?

[SkyBound]

I was hooked up to 15A service and may have used a bit too much power all at once, but no breakers tripped so I'm assuming I was OK. Went to hitch on to leave and my electric tongue jack wouldn't work - checked the 30A fuse and it was blown. If my power draw was too high for the 15A power source, would that somehow blow the fuse for the tongue jack? I don't know why/how it happened.

[TakeItEasy]

Funny same thing happened to me yesterday. It turned out my truck battery was low, because I left the door open. When I started the truck I assume it pulled power from the trailer battery and blew the fuse. I shut the truck off and could not start it again. Thats when I found the blown fuse.

[Siamese]

Usually, when those things blow, it's because you raised the jack a little too much. Don't know if that applies in this case?

[Scott_Trailer_Newbe]

Battery voltage was too low.

[01tundra]

Originally Posted by Siamese

Usually, when those things blow, it's because you raised the jack a little too much. Don't know if that applies in this case?

That's ^ what has caused mine to blow a couple times now.

[TWP723]

Like Siamese and 01tundra mentioned, if you run a jack to where it starts clicking (at the end of the travel), it can blow the fuse.

[DonaandDon]

If its a inline fuse, then I would replace with -

Available at a auto store near you...