 Battery Isolator: Any benefit?, What's the nominal "off" current? |
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| LikesSummer |
 Aug 20 2026, 01:23 PM
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#1
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Newbie  Group: Members Posts: 6 Joined: 27-March 26 From: Ontario, Canada Member No.: 29,327 Region Association: Canada  |
So assuming one has an unmodified car, what's the key-out, "off" current on these? I've got a 72 4 which doesn't even have a radio. I could certainly go through the wiring diagrams and determine this for myself if this is potentially anything other than zero, but there's a good chance I'll miss something quirky, so I'm asking the experts.
If turning the car off brings the background current to zero, then there's no need for an isolator obviously. |
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| Ninja |
Aug 20 2026, 02:46 PM
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#2
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Member Group: Members Posts: 280 Joined: 25-September 25 From: Granbury Texas Member No.: 29,004 Region Association: Southwest Region |
Without a radio (with a memory circuit-modern) or a clock it should be zero.
Easy way to determine. Pull negative cable off of battery, attach a test light or DVOM (amps) between the cable and terminal and you'll have your answer. |
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Posts in this topic
LikesSummer Battery Isolator: Any benefit? Aug 20 2026, 01:23 PM
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