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Thread: Centech fuse block and relay

  1. #1
    redcat43 redcat43's Avatar
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    Centech fuse block and relay

    Need some advice on where and how to locate a Centech fuse block and relay on a 2007 R1200RT. Google didn't give me much on this subject. I want to add a couple of accessories without stacking connections on the battery terminals.
    No matter where you go, there you are.

    2007 BMW R1200RT

  2. #2
    Registered User
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    There are plenty of threads on this site- do a Forum search and you'll get lots

    Major fuse block brands include Centech, Fuzeblock and Eastern Beaver (there are others) each with its own virtues.

    The Fuzeblock is easiest to wire because it uses an on board relay and its circuits can all be made switched or unswitched. The Eastern Beaver has the most individually fused circuits (8, 3 of wich are unswitched). Centech is commonly done by dealers and is the "old reliable" of the bunch and the most common.

    Most put the block under the rear seat toward the front of the rear fender but there are a few who put it up in front near the headlight- best choice for you dpends on what you want to wire. (I use an Eastern Beaver that has all slots in use and is on the rear fender).

    There are various places to get the trigger wire depending on what you want
    1) Dealers often tap it into the rear accessory outlet wire because its easist to get at. This is live until the ZFE shut if off 20-30 seconds after the bike is keyed off BUT may sometimes take 30 minutes (enough to kill a battery if you leave a high wattage accessory switched on)
    2) For an instant off one can tap into the parking light wire up front, or the diagnostic connector or start relay in the box near the fender.
    3) Also instant on off but not until the engine starts- tap the trigger into a low beam headlight wire.

    Others also possible...

    Fuse panel relays and those of most accessory harnesses use unprotected (against "reverse voltage" spikes) relays (no diode or resistor on the relay coil).
    So to ensure electrical isolation of the panel stuff from the bikes electrics, I like a diode in the trigger wire (1000-1500 PIV, 1A, about 50 cents at the Shack). Reason is that BMW publishes no circuit diagrams for the bike main computers like the ZFE so one cannot assess how well they are protected against stray voltages- they're probably well done but there is no published info and killing one would be pricey....

    Do follow good wiring practices re protection, making connections, and fusing. There is a lot of sloppy homebrew wiring out there that is unreliable and a possible fire hazard.

  3. #3
    Outlander Omega Man's Avatar
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    Hi redcat, if you Check out this Best of Forum segment I think you can get some good ideas. Gary
    "Well they say.. time loves a hero but only time will tell.. If he's real, he's a legend from heaven If he ain't he was sent here from hell" Lowell George
    Type M for Moderator
    2009 F800GS 1994 TW200

  4. #4
    redcat43 redcat43's Avatar
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    Many thanks Omega Man. The instructions w/ photos look pretty straightforward.
    No matter where you go, there you are.

    2007 BMW R1200RT

  5. #5
    redcat43 redcat43's Avatar
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    CycleNutz Relay Harness

    Will this CycleNutz harness do the trick? It seems to be the simplest and most straight forward way to connect a trigger wire.

    http://www.cyclenutz.com
    Ezy-Mount Plug N Play Parking Lamp Switched Power Interface
    Item Id: EZY_PNP-SWTCHPOWER
    No matter where you go, there you are.

    2007 BMW R1200RT

  6. #6
    On the Road
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    southern New Mexico, desert mostly, ride almost year round, put about 15K on the bike commuting over San Agustine Pass each day...
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    fuse block

    I found a fuse block that had 8 fuses in it, cut it in half and added a relay to be key activated, added (1) a J&M CB/intercom/music, phone or Garmin connector, (2) a BMW style socket outlett, (3) a cigarett Lighter socket outlet, (4) and a heated grip set to it. Cheaper than the high end stuff, but very effective....the trouble is finding a place to put the thing....craig in nm

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