After recently having an issue with a blown radiator fuse in my F355 I thought it would be a good idea to car some spares with me. I also wanted to review where the fuse box was located. I did some searching but didn’t find anything straight forward. So here it is.

In Section L – Electrical System page L21 of the owner’s manual you will find a diagram of the fuse box layout:

If you look at the legend you’ll see:

that:

20 = RH radiator fan

24 = LH radiator fan

Thus, they are here:

The fuse box location is in the front of the foot well on the passenger side, which you access from inside the car. An old photo I have is:

which looks a bit strange compared the owner’s manual but that could be because my car is Australian delivered. If you look carefully you can line up the layout (in my picture there are 3 x relays at the top, while the owner’s manual has the same 3 at the bottom).

You can also pick the radiator fuses because they are larger (initially 30A but now 40A) that any others. I’ll have to get a better picture at some stage.

So if your F355 is getting overly hot when stuck in traffic for example, first step is to peel back the front all of the passengers foot well and check that the radiator fuses are not blown. They were originally 30A but have been upgraded to 40A as the ‘unofficial’ fix I was told. Main point, is I now carry some spares, just in case and now I also know where they are if they need to be replaced!