Service Procedures
Buyer's Guide


PLEASE read these instructions before you install the fuseblocks. I guarantee they will answer most of your questions and make the install go faster!

1. Before removing wires from the old fuseblocks, number your wires so you can put them back in the right place. (I number the top row T1, T2, T3 with T=top) and the bottom row just 1, 2, 3, etc. For the tabs on the fusebox (on the top) that have no wire, just skip a number on the wires. (i.e. each fuse gets a number, wire or not, like the diagram to the right). Remember that on the bottom row, some tabs have two wires. Label them both! (With the same number).

2. Pull the wires, unscrew the exisiting fuseblock, and screw in the new one. (I recommend doing only one at a time to minimize stray wires). Be sure to put the one marked "right side" on the right, and the one marked "left side" on the left...they are different!** (See note below for Right Hand Drive cars). Pay attention to which side is up. There is an arrow on the back which points up. The soldered "bus bars" are on the top row, not the bottom.

It is never a bad idea to visually confirm that the bus bar pattern on the back of the Birdman Block match with the bus bar on the OEM block you are replacing. First, this is just a sanity check. Second, (and this happens often) one of the OEM blocks has been replaced by a previous owner with the incorrect block. The injected and carb blocks have a different bus bar pattern. You can make the wrong one work with some jumpers and this is what some owners have done, including the previous owner of my car. A melted fuseblock was replaced with an injected one from eBay and they did a work-around to make it work right.

If you have ANY concern whatsoever about a new Birdman Block verses an OEM one, place them next to each other and take a picture of the back so I can see the bus bars. Then e-mail it to me. I'll tell you what is up. I DO NOT MIND!! If you aren't sure, ask!

IMPORTANT: be sure to install the new fuseblocks with the shorter screws that I supply with them.

Birdman Fuseblocks are thinner than the stock ones, and if you use the longer stock screws, they stick out the back of the panel and can pinch a wire.

Be gentle with the fuse holders on the ends of the new fuseblock (#1 and #9 in the diagram above). They are not riveted down like the other fuseholders, but only held in place by the bus bar. The mounting screws for the whole block go through them. Once they are screwed down, the screw takes the place of the rivet used on the other fuseholders to hold them securely.

3. Now put the wires back on the right tabs, and put in AGC-type fuses. These fuses are available just about anywhere from the local hardware store to autozone and even places like Wal-mart. They are standard "glass fuses." Consult your owner's manual or the old fuseblocks for the proper fuse values. You may not be able to get the exact same fuse values as stock with the glass type fuses. The glass fuses have a slightly different set of values. Just use the closest value. For example, my OEM fuse blocks called for 16 Amps on many circuits and I'm using 15 Amps which is fine. They don't need to be exact, just fairly close so they will blow if you get an electrical problem but not blow if everything is working correctly.

NOTE: Some circuits have two wires connected to them, and some only have one. In the case of the circuits with only one, just plug the wire right into the fuseblock. In the case of the circuits that have two wires, use the included "piggyback" splitters to connect two wires to one fuse.

4. That's it, you're done. This procedure should take no more than an hour, working at a leisurely pace. The only tools required are a screwdriver and a sharpie pen!


Number the wires according to this chart on each fuseblock before pulling them.

This is what your fuseblocks look like then they are installed.

The fuseblocks will come with short screws, but they will also come with slightly longer screws and spacers to create a gap behind each block. This is because some GT4s run some of the wires behind the stock blocks. You can choose which way you want to install them. However, if you choose not to use the spacers, use the short screws (included). The GT4 installation takes a bit longer than the GTB/GTS because of the tight working space. Take your time!

If you own a RIGHT HAND DRIVE car such as in Australia, New Zealand or the UK, you will find that the back of the Birdman fuseblocks are not labeled Right and Left. That is because there is some confusion on the orientation of the fuseblocks in different markets. In order to keep from making a mistake in labeling them, I am not labeling them and instead leaving it to you to put them in the right place. Remove one of the old fuseblocks, look at the pattern of "bus bars" on the back, and then replace it with the Birdman block that has the same pattern. Left and right are always different. Don't worry, the Birdman Blocks will be the correct ones, I am just avoiding mistakes and confusion by having you visually conform the correct location of left and right when you install them.

The covers from the old fuseblocks do not fit onto these new ones. I know it would look better aesthetically to make these look more like OEM, but the fact is that the stock fuseblocks are narrower than it is possible to make these. The other fact is that the cover on the OEM fuseblocks is there to prevent molten metal from the old-style exposed link fuses from lighting your car on fire. The AGC fuses used in the Birdman fuseblocks are glass encapsulated, so the cover is not neccessary anyway.

Here is a closeup of how I number my wires. The bottom row is 1, 2, 3 etc. and the top row is T1, T2, T3, etc.


Note T2 is melted from the original fuseblocks overheating. Also note the use of the splitters on the bottom row for the circuits that have two wires (1,2,6 and 7 on this example). Note that T4 and T8 have no wires connected. They get power through the bus bar on the back of the fuseblocks.

This shot of the left fuseblock of an injected car shows that T1 and T2 have multiple wires on the TOP not just the bottom. You can use the "piggyback" connectors here as well. Note the right fuseblock has not been changed yet. I like to do them one at a time to minimize confusion and rat's nest syndrome.