I took some measurements on the Insight with an inductive ammeter. All the measurements are with the engine, and the DC-DC converter, off. 12.6V.
Code:
0.0A - key at ACC
0.4A - radio
16A - power window
6.9A - blower at "1"
8.2A - blower at "2"
12.7A - blower at "3"
13.6A - blower at "4"
7.7A - when key is first switched to ON. Priming fuel pump, etc
4.3A - key at ON
If I wanted to take some readings with the engine on, I'd have to locate the DC/DC converter's wiring first.