+12v and remote starts

Hey guys, I have a question for you.  In the newer vehicles, we are seeing smaller wires in the ignition harness.  In fact, Directechs specifies current capacities on many +12V wires located there.  Most of our remote start units have dual power wires each with 30 amp fuses.  So in the cases Directechs specifies less than 60 amps, we have been running power directly to the battery.  I was wondering what you guys use as a reference to get power at the battery.  Do you guys still use the ignition harness even when Directechs specifies like 30 amps?  Thanks for your input.

I asked that same question to the instructor at the snake pit in San Diego.  I was told that if the constant power wire is able to power up the ign harness then you can just use that.  For example, if you have 2 constant wires on the ign harness then tap into both.  Otherwise if you have 1 then just one unless specified by DEI like the 2007 Chevy Avalanche where Directed actually advises to go to the battery.

Since they are already fused I like to run it to the battery supply to the fuse box in the engine compartment.  The connection is typicallly covered by the plastic cover to the fuse/relay box so it looks clean with a little loom.Good Luck!

-Thad