I need some help, I think I may have a blown radio fuse, I found one that say radio acc (accesories), but I know that usually you have two of them. I looked on the fuse box under the hood and the dash and i can't find the second one.

 

It is probably not marked as a radio fuse, maybe backup or backup power and may be a 7.5A, they are almost always in the under hood fuse box.

Is it still the stock HU or do you have an aftermarket?
Most aftermarket HUs need mor current then can be supplied by the stock constant power lead, do not replace any blown fuse with a bigger one. 94

 

I would first check if the door lock outputs on the alarm are programmable, [pulse duration].

What is the make and model of the alarm? 94