battery switch

Discussion in 'Motorhome Security' started by vaughan, Dec 16, 2008.

  1. vaughan

    vaughan Read Only Funster

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    Has anyone considered fitting a battery isolator switch in the main
    starter cable, between the battery and the starter? The switch I have
    in mind has a 200 amp rating and the vehicle is a 2.8 Ducato base. An isolator switch fitted
    other than in the starter circuit would, I imagine, interfere with the
    onboard immobiliser, alarm and engine management system.
    Any thoughts, suggestions?
    :Eeek:
    Vaughan
     
  2. TJ-RV

    TJ-RV Deleted User

    Are you merely adding an extra level of immobilisation?

    There's no reason the right switch wouldn't work. I've used switches like these or their competitors on motorhomes and boats for many years.

    Your other option would be to put the switch in series with the battery and run power for the immobiliser, alarm, and ECM bypassing the switch.
     
    Last edited by a moderator: Dec 16, 2008
  3. pappajohn

    pappajohn Funster Life Member

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    sorry vaughan,

    the 200amp switch just aint man enough for the job.

    your starter motor wil draw somewhere between 500 and 600amps, or more, on a cold start.

    the isolator switches are designed for the main BATTERY lead only and yes you are right....it will cut power to everything connected AFTER the switch. anything connected to the battery itself will still be live.

    john.
     
  4. TJ-RV

    TJ-RV Deleted User

    That be why I linked to a switch with 700A cranking (starting) current capacity :Wink:
     
  5. pappajohn

    pappajohn Funster Life Member

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    sorry Tom......jumped in with both feet.....i never followed your link but at least we both agree.........:thumb::thumb:

    i once wired in two Cibie 100w spotlamps to my car through a cheap rocker switch and no relay (you do stupid things when you dont know any different) needless to say.....it melted. :Doh:
     
  6. TJ-RV

    TJ-RV Deleted User

    No need for apology John. I'm usually wrong at the top of my voice :Sad:
     

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