Blowing Fuses

So I noticed that I am constantly blowing the fuses to my controller/relay. i have a 30amp fuse in there and I bought one of the temp control units from o'reillys. One thing I noticed is that the wiring is a lot smaller on the control unit, but I went ahead and wired to it anyways, relying on the fuse. But it keeps blowing. Also my fuse for my radio/interior lights blows when the fan kicks on, any ideas or suggestions?

yes, yes, and yes, except I am going to run a wire from the ground on the from from the back of the car to the block and run a bigger bolt on the grounds in the front. I am also going to connect a surge suppressor diode, but do i just soder it in and cover with heat shrink or how do you do that? I'll see if that helps.

I have a fan control I bought from O'reilly's HAYDEN, INC. - Cooling Fan Control
Item No: 3647. It didn't have as big as wiring as the 10 gauge I bought, but here is how I wired it:

One 10g wire from the solenoid to the control/relay, there is a 30a fuse on the control line there. From there it goes to the power on the fan with a 10g wire.

one 10g wire from the negative on the fan to the ground where the battery used to be.

One wire from the control to the 12v power on of the low coolant sensor. '

One ground from the control/relay to the battery ground.

Right now I don't have the a/c hooked up so that is all the wiring there is. There are about 5 different wires grounded to the battery ground. Only problem is it is just a self tapping screw holding all the wires onto the ground spot.

I bought a surge suppressor diode from radio shack and am going to wire that in, but I don't know how to connect it, as mentioned above to help, I assume with the pull of the fan when it starts up.

I was thinking about changing the ground on the fan to a spot over on the passenger side, but don't know if that would work or not. I mean, where could I ground to there?

That's the thing, the controler comes with a relay on it, and it is all wired via the controller. Everything worked fine when I simply had a relay hooked up and power on whenever the 12v key on was on.