Vehicle & Technical > Defender

Battery cut off switch wiring

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paul_humphreys:
Best way is to put it in the earth lead.

Paul

Litch:
Rather than spending £5 on a standard isolator switch best to pay £22 and fit an FIA master switch which kills the engine & protects the alternator when you turn the key. Wiring is simple (it comes with fitting instructions) and you know that in the event of an emergency you only have to hit one key to make everything safe. I have been using these on my LR's for 20-years and they proved to be 100% reliable even after immersion in water.
They add a certain amount of security as unless any thief is carrying a key or can get to the rear of the switch to re-terminate the cables (even assuming they can locate the switch in the first place) the vehicle isn't going anywhere without the aid of a spec-lift or flat-bed.


Normal proceedure with the FIA switch is to inturrupt the +VE cable and yes, a low-rated bypass fuse will provide power for the alarm etc but will not allow the vehicle to be started.

tonycougar:

--- Quote from: "paul_humphreys" ---Best way is to put it in the earth lead.

Paul
--- End quote ---


Just curious, any particular reason?

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