125 amp fuse replacement

You have to remove the fuse box primarily from the fender. At that point the top and middle sections can be separated.

 

What a pain in the butt! I think that if I ever had to replace that thing I'd solder on some this
wires and mount it elsewhere!

 

Some have used a bypass but the one I saw had corroded badly and failed again. It has to handle over 100 amps which precludes normal small gauge wire.

 

Clean up the corrossion, solder 145gauge wire to and external fuse holder.
Since it's so rare these blow, like someone hooking a jumper up incorrectly, I'm not going
to worry about it.
But "if" mine blows, after fixing the problem that caused it to blow, external it is!

 

As an academic exercise I've put together the way I would bypass a blown 125 amp if were caught on the side of the road in West Texas with only a NAPA store at my disposal. The tricky part would be finding an appropriate fine stranded cable, either a cheap jumper cable or a junk yard piece of the original white fuse box cable.

 

To access the ring lug:

Video #23 here:

Nutz About Bolts Prius Maintenance Videos | PriusChat

 

I have plenty of wire..... And that ground connector....

 

You can get connectors that work with al and cu. There is also an anticorrosive compound you can use. In any case my scenario would be cu to cu and only temporary.

Bottom line - use a lithium jump pack with polarity protection - only!

 

I don't know if Nyone still needs this, but this is the video I used to replace it.

Pulling out the block was much, much harder than in the video, but I managed.

Now my car starts, but only for a few seconds before cutting out, also no interior lights etc brand new 12v... so I needed more than this...

Best of luck!

 

The hard to replace125a is in the gen3 cars rather than the gen2 shown in that video, although gen2 is certainly not plug and play.

Usually there are more fuses blown.