Installed my Tekonsha P3 today. Now a few qustions

[Lazydog]

Installed my Tekonsha P3 break controller today on my 2500HD LBZ.
Bought the plug-n-play wiring harness for easy install.
Everything went great was finished in about 5 minutes.

I checked the fuse box under the hood and seen that a 30amp fuse was already in STUD #2.
First question is should I upgrade this to a 40amp fuse?
Most of what I will be towing will be 2 axle electric break.

I was also reading about some wire that in most cases is not not connected for suppling power to the trailer.
I have not been able to find this wire so until I can get a voltmeter I will assume (I know) that it too is already hooked up.

Last question is there anything else I should/need to be looking at?
Thnx in advance for the replies.

 

[RI Chevy Silveradoman]

I left the stock fuse in my fuse box, and I have not had a problem. I have an original prodigy, that also came with the 40 amp fuse, but left the 30 amp fuse in there! You should be OK!

 

[Diesel Dually]

I put the 40 in because I was dragging a triple...

 

[OCDUNE]

No wires to hook up on your 06, only on the newerstyle trucks, just make sure there is a fuse there and you will have power at the rear.