dead battery / blown fuse

That would definitely stop it from starting. There's a lot of subsystems on that bar including engine control and the hybrid system. I hate to say it but it could be very bad, but I'm sure someone else here can say better than I.

 

Assuming you had the jump positive on the right spot, I think you put your negative jump lead on the attached 12v buss bar of the fusible link causing a direct short of your jump battery within the fuse/relay box. It may have damaged just that bar, which is replaceable by itself or it may have damaged the whole fuse box. If I am right (and I can't tell the extent of the damage) its possible the car is not otherwise damaged.

The best thing to do is get it to a dealer for a proper diagnosis. If you insist on more diy, I would first figure out if the fuse box is still good by replacing the fusible link. Or change the entire fuse box if necessary. Both jobs include removing the main power feed, bolts and clips. Not as easy as pushing in a new fuse.

(New fusible link)

Obviously you have to disconnect the 12vdc battery first

https://ebay.to/3oise9C (Used fuse box w fusible link)


https://ebay.to/2HpEPqH (Used fusible link)

Fusible Link Cables

 

font hard to read.

 

By the way, when I had my 08 Prius I printed this out, placed it inside a zip lock bag and placed it under the cover of the engine fuse box. For use by my wife or others in the future. I also had a cheap small gauge jumper cable set in its packaging under the driver's seat since the big sets often have huge battery clamps that were difficult to use on the powerpoint.

 

I would start with just the fusible link that got zorched, and see where that gets you.

It is a bit of an exercise to replace.

 

Its guaranteed the fusible link is bad at the broken part. 12v for many of the systems has to flow through that bar.

 

Replacing the fusible link assembly will hopefully solve your problems.

I have never never never seen that much damage to a fusible link assembly, because that didn't even damage one of the fusible links. It smoked the actual busbar that supplies all the fusible links. That is why I can pretty much guarantee there are no damaged circuits downstream.

Now, as for the above question, being a lifetime wire-biter, I just about sprayed my drink onto my computer. That would be like shooting a cannonball through your engine and asking a mechanic if he thought it would prevent the engine from working, lol. At least a fusible link assembly is relatively inexpensive to replace.

 

I would definitely try again by cycling it on and off a few times. Usually required even with everything good. Obviously you should check all those fuses one by one, ensuring you get each into their right spot.

 

Victory!