What fuse should I use for Add-a-circuit for my XM install?
 

Here are a few things.
1) The Add-a-circuit instructions say not to use it for anything more than a 15amp fuse. The Horn (which seems to be everyone's fuse of choice is a 25amp fuse.
2) There are a couple 'empty' fuse slots in the fuse box. I assume those are LIVE and I could use them, but I don't know if they are switched with the ignition...which I would like. (There's one way to find out...)
3) What size fuse should I put in the Added Circuit? What is an 'E' fuse?

Just use the "75X" power point under the driver's side of the dash.
 

<center><img src="http://pictureposter.audiworld.com/59076/fusebox20wiring.jpg"></center><p>

I don't dare touch that stuff... I know nothing...seriously nothing about electronics
 

It's a big leap to try the Add-a-circuit method of hardwiring via the fise box.

I appreciate the help, but I think I will just try and ground it on the metal framing in the fuse opening.

It is actually much easier than trying to do the add-a-fuse and looks much better in the end.
 

Your sat radio wiring probably came with an inline fuse anyway. Just attach a ring terminal to the power end and bolt it down on the 75X terminal. You will also see two large ground terminals down there. Do the same thing here with the ground wire from your sat radio wiring harness.

The only thing you MUST do is disconnect your battery first. You don't want put a wrench on these power terminals and accidently turn against something metal (grounded). Sparks will fly.

WAIT!!!! I do not know which XM you have, but my Roadie 2 is a 6 VOLT set up...do not straight wire
 

I put a double aux. jack under my dash wired into the fuse box, and ran the stock cord to that. Be careful or you might blow your XM unit!

Here is the fuse I used
 

I am traveling on business so can not look at the car...but it is his one your see. Wired the negative to a bolt near the box.
This was fuse only hot when the car was turned on, so the XM goes on and off with the car, instead of having to turn it off and on each time (I think it might be for the rear wiper).
<a href="http://photobucket.com" target="_blank"><img src="http://img.photobucket.com/albums/v299/twovettes/d559204c.jpg" border="0" alt="Image hosting by Photobucket"></a>