Going from memory, I think there's one in the fuse block under the dash and there's a bigger one in the fuse block under the hood by the master cylinder.
Could be a blown fuse if the button stopped working. What does the dash indicator show? If the system is working, it should have self leveled once you started driving at got past 15 or 20 mph.
The crack(s) tend to be small. When mine cracked, it would stop in less than a minute as the heat would cause the manifold to expand and seal the cracks. I could hear the ticking the best being parked in my garage with the windows down, truck in drive or reverse.
My rear calipers were fine. The backside of the rotors were destroyed but the outside looked fine. My grabbing feeling was during light and moderate braking.
If you search the forum you'll find many posts on cracked manifolds. I had my right one replaced and the new one has cracked too. Toyota didn't redesign the part so it's very likely to crack again. It's not necessary to fix it. I changed mine because I could stand the ticking sound the leak made.
CV boots tearing/coming loose are common.
The other big hitter on the V8 is cracked exhaust manifolds. You'll hear a ticking sound at start up if they are cracked. The sound goes away when the manifold heats up and closes the gap. It's about $1800 a side if a dealer does it.
When you bled the brakes did you let the pedal bottom out? It could have damaged the seals in the master cylinder.
Also, did you have the ignition "ON" when bleeding the rears?