Accessory Fuse Block Installation

If you've ever wanted to add more accessories to your bike it'll get to the point that your battery posts look like spaghetti and that one time you leave the grip heaters on you'll wish you had this setup. The solution is a switched fuse block that centralizes the addition of accessories off the battery and prevents battery drain. The beauty of this project is you can install as little as the relay and still reap the benefits of having a switched circuit for 1 accessory if that's all you're planning on adding. Back to reality, who only adds 1 accessory.... so let's get back to the full blown fuse block procedure. I'm doing this writeup after my install but the picture and schematic diagram should be enough to implement it. Here we go...

Parts list: 1) Buss fuse block purchased from your local Shuck's, Kragen, or other auto parts store. I used a 6 post, but you can use whatever size best fits your current and future needs. 2) A 30 amp automotive relay normally used for offroad lights. This can be purchased at your local local Radio Shack or auto parts store also. 3) An inline fuse for a fused circuit before your relay, this prevents your relay from burning up if there's a spike or short. I used a mini fuse type that I purchased from my local auto parts store. 4) Junction block to use as a centralized ground bar. The size should be based on your current and future needs and this enables you to use one centralized connection and share your ground. 5) A junction block combiner, it looks like a comb and connects the junction posts together. I purchased it at Radio Shack with the junction block.

Hookup one end of the inline fuse to the positive terminal on your battery and the other end to the "positive in" on your relay. From the relay you'll also have a negative, that's your ground (you can use your combined ground or a separate ground). The last 2 posts on the relay are a switched positive terminal that you can splice into your license plate light and the "positive out" goes to your fuse block. Once your license plate gets juice, it'll close the the relay and allow the power to go to your fuse block. Hooking up the fuse block is easy, all you have to hook up is the "positive out" from the relay to your positive post on the fuse block. The junction block is your shared negative connection and there's only one hookup, to a ground (make sure the combiner is installed on the junction block otherwise it defeats the purpose). I used the rear most bolt that bolts the sub frame to the rear fender on the right side (if facing forward).

Now all you have to do to add an accessory is connect the positive lead and a fuse to your fuse block and the negative to your junction block. Below I have a simple schematic and a picture of the installation. Shoot me an email if you have any questions, I received a decent amount of help from others when setting this up myself.