Fuse Block / Power Distribution Block Placement - Near Battery or Under Seat? - Yamaha FJR Forum : Yamaha FJR Owners Forums
View Poll Results: Where did you mount your fuse block?
Under Seat 7 87.50%
Near Battery 1 12.50%
On Frame 0 0%
Other Location 0 0%
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post #1 of 25 (permalink) Old 11-05-2019, 12:38 AM Thread Starter
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Question Fuse Block / Power Distribution Block Placement - Near Battery or Under Seat?

Hi All,

As winter approaches, we're adding heated gear to our motorbikes. I'm a 4-season rider commuting in the PNW's cold, wet, rainy winter months. Just added Oxford Premium Adventure Heated Grips.

But . . . now looking at my battery terminals, it seems that I'm adding more and more rings on top every six months.

Added Oxford heated grips
SAE Battery Tender SAE charger connector
PIAA Slim Sport Horns (relayed)
Planning to add more power connections for 12v gloves/liners/jacket

Thinking about the Eastern Beaver PC-8 with the FJR specific kit.
http://www.easternbeaver.com/Main/Bi...c/FJR/fjr.html

Open to a FuzeBlock as well but seems EB has a more tailored product.

Location:
Under Seat
Most riders seem to be installing under the seat. As the battery on my 2005 is up front on the right side of the front fairing, do I also now have to lengthen all of those + and - power cords to those accessories to run to the under seat location for that FJR-specific kit and PC-8.

Near Battery
Most of my connections have a minimal amount of slack but enough to safely turn the forks in either direction without pinching or binding. There seems to be an large enough spot on the inside of the frame side inches from the battery to glue/velco a fuse block there. Has anyone used that location?

Can or does anyone have any pix of their during or after install of that EB PC-8 fuse block?
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post #2 of 25 (permalink) Old 11-05-2019, 12:43 AM
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Can't help. I have a FuzeBlock mounted under the seat. I like having a combination of switched and unswitched circuits.
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post #3 of 25 (permalink) Old 11-05-2019, 01:42 AM
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You misunderstand the function of the fuse block.
The way it is wired is this.
With the fuse block mounded under the seat you will run two larger wires, one positive and fused at the battery. The other ground. Those wires are large enough to handle the 40 amps total the fuse block is capable of handling. Your individual loads like an electric jacket will be wired to the fuse block via the individual circuits.
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post #4 of 25 (permalink) Old 11-05-2019, 03:00 AM Thread Starter
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Quote:
Originally Posted by mobilemike View Post
You misunderstand the function of the fuse block.
The way it is wired is this.
With the fuse block mounded under the seat you will run two larger wires, one positive and fused at the battery. The other ground. Those wires are large enough to handle the 40 amps total the fuse block is capable of handling. Your individual loads like an electric jacket will be wired to the fuse block via the individual circuits.
Thanks for replying. Don't I still have to run the existing wires on the + and - battery posts to the rear if I choose the under seat option?

My current wiring is running mainly up front to the battery. So I'm thinking I'll be doing some extensions.

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post #5 of 25 (permalink) Old 11-05-2019, 07:17 AM
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If you install under the seat any new connections would go there. It's your option to move the existing to under the seat (requiring additional length) or leaving them at the battery as they exist now.

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post #6 of 25 (permalink) Old 11-05-2019, 08:47 AM
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Under seat.

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post #7 of 25 (permalink) Old 11-05-2019, 10:00 AM
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I mounted mine under seat... can also do the tail, but I use that space for a tool kit. Here I ran 10 ga. wires from the battery, to a 50 amp connector where I can plug in a mating connector on the end of a set of booster cables. These days, we have jumper packs, so booster cables aren't really necessary.
From the 50 amp connector, the 10 ga continues to the PC-8 fuse panel, and its relay harness. The trigger wire is any circuit that comes on with the ignition, e.g., tail light or licence plate wire... very low draw.
With a Fuzeblock, it only takes 12ga wire and has an onboard relay.







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post #8 of 25 (permalink) Old 11-05-2019, 10:48 AM
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DIY move from under seat to free up space.

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post #9 of 25 (permalink) Old 11-05-2019, 02:32 PM Thread Starter
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I forgot over important item: I have my Dynojet Power Commander III module under my seat on the tray. Might not have enough room for a PDB there. Maybe under the passenger seat?

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post #10 of 25 (permalink) Old 11-06-2019, 02:47 AM Thread Starter
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Quote:
Originally Posted by jtdunc View Post
I forgot over important item: I have my Dynojet Power Commander III module under my seat on the tray. Might not have enough room for a PDB there. Maybe under the passenger seat?
Any further insights?

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