Parasitic draw? Pete 589

Acek27 · May 9, 2020

Goodysnap said: ↑

If you have installed a master kill switch to prevent drain, you still have something hard wired direct to the batteries causing your drain.

It is measured no different than a car. Just the amount of drain can be higher over a given time, as you have more reserve capacity with 4 times the battery storage or more.

Is your alternator powered through your master switch? Shoot it with a temp gun to see if its still warm after setting overnight, or disconnect and see if your drain goes away.
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And what if it is warm in the morning? Does that mean I need new cables? Kill switch? Btw my kill switch is on the positive post, I've been reading alot of fourms say to always have kill switch on negative, atleast for cars, dont know if it applies to semi

BoxCarKidd · May 9, 2020

Do you mean the alternator he mentioned?
If it is warm in the morning the windings are energized. Alternator is bad. However should be cut out by your battery cut out.

Goodysnap · May 9, 2020

Everything heavy I have ever seen breaks positive side, not ground.

Again I say retrace your wires to the batts. You have something still hooked up that doesnt go through your main disconnect.

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