battery switch (1 Viewer)

[vaughan]

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?

Vaughan

 

[TJ-RV]

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.

 

[pappajohn]

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?

Vaughan

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.

 

[TJ-RV]

That be why I linked to a switch with 700A cranking (starting) current capacity

 

[pappajohn]

That be why I linked to a switch with 700A cranking (starting) current capacity

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. oh:

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[TJ-RV]

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