tractor batteries keep draining

cb in wisc · Apr 28, 2013

I must have electrical short that I can"t seem to find as the batteries on my Oliver 1650 diesel
keep draining, especially in wet conditions.
Any ideas?

Bill in Colo · Apr 28, 2013

I have two units with single pole alternators that will drain if I don't disconnect the wire they both have switches now . The alternator post shows resistance to ground on a Ohm meter.

old · Apr 28, 2013

I would start by pulling a battery cable and putting a test light between the cable and the terminal. If it lights then yep you have a drain and then one by one remove wires like from the alternator/generator which ever it has till you find which one turns it off. If it does not light at first one of the batteries maybe bad and from what your saying it sounds like you have 2 or more batteries and if one is bad it can/will drain the good one

rrlund · Apr 28, 2013

Same thing on my 1550 Oliver. Most folks refuse to believe me. I put a toggle switch in the big wire from it. Have to turn it off if it's gonna sit very long.

JD Seller · Apr 28, 2013

I have seen dirt inside of the alternator do this. It will conduct low current when wet. Just enought to drain the batteries when setting.

Unhook the battery wire on the alternator and see if the battery stays up. Also does it have an internal regulator?? It could be bad and draining the batteries.

Jonak · Apr 28, 2013

I have had Battery drain problems with two cars. One was trunk light staying on, the other, electric antennae failing to turn off.

JF in MI · Apr 28, 2013

This is the best advice for the simplest way to find a short.

tractor batteries keep draining

cb in wisc

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Bill in Colo

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old

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rrlund

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JD Seller

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Jonak

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JF in MI

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