Fuses on the trail mini

I am a new owner of a 2010 Trail Mini. I have an issue with the 20 amp fuse that goes to the battery. I have blown it twice. (it seems to happen when I plug the unit in) The schematic in the owners manual shows it should be a 30 amp. Does anyone have any thoughts/advise.
Thanks

[Wavery]

Originally Posted by Debbie

I am a new owner of a 2010 Trail Mini. I have an issue with the 20 amp fuse that goes to the battery. I have blown it twice. (it seems to happen when I plug the unit in) The schematic in the owners manual shows it should be a 30 amp. Does anyone have any thoughts/advise.
Thanks

It should be a 30A and be sure that your white wire from the trailer is on the neg side of the battery and the black wire on the positive side.