Question about Schumacher 10 Amp Fully Automatic/Manual Charger by

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Schumacher ss-51a-pe battery charger with no output.

Charger transformer does "hum", but no output at clamps when hooked to battery, or even when "dead shorted" together.. Any tips will be welcomed.. L.F.

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The power regulator has gone bad. $13 at autozone

Posted on Dec 25, 2015

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Soo sorry, unit is DEAD.

Posted on Mar 10, 2009

  • Mark Poppell
    Mark Poppell Dec 25, 2015

    Power regulator bad.

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1 Answer

I have a Schumacher 6/2 amp dual charger, SE-82-6. I took off the clamps. Now don't know which wire is positive. One has a white line on it.


Get a volt meter and hook up the test probes to the cable ends and turn the meter on, the meter will say 12 or -12 if it says 12 then you have the red and black from the meter connected to the red and black on the charger in the right manner, if it says -12 then you have them reversed. Take the cable clamps and put them back on.

Mar 01, 2016 | Schumacher SE82-6 Manual Charger...

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Both Battery clips have come off of Schumacher SE-5212A Charger. Need wiring diagram to make sure I replace them correctly to the battery cable wires.


use a voltmeter. turn on unit to a low setting, place volt meter leads on broken wires one on each. if the voltage goes positive on meter. the positive clamp goes on the wire that the positive(red) voltmeter lead is on and the same for the negative.
Good luck

Jun 28, 2011 | SE3010 2003010 Amp Manual Starter and...

1 Answer

I have a Model SS-51A-PE charger that will not charge an auto battery. Is this normal or is the charger mat functioning ? Don Robinson


If a battery is defective, it will not accept a charge and it is not the fault of the charger. When connected and switched on, with the clamps making solid contact, the amp meter should give you a reading, depending on the state of the battery. To do a quick test on the charger, try it across a headlamp bulb, The bulb should light and the amp meter should read about 5 amps.

May 11, 2011 | Schumacher & Fast Charge Starter Charger

1 Answer

I have a Schumacker Model SS-51A-PE charger and was charging a boat battery when I heard a medium-to-loud pop. I checked the charger and realized there was no output. It hums quite loudly when plugged in...


Quite simply - the unit has suffered component failure - most likely more than one. Capacitors are the usual source of noisy 'bang' or 'pop' sounds, followed by diodes and bridge rectifiers. If you have some knowledge of electronics, you can attempt repair, but, if none, I suggest leaving possible repairs to someone who does.
The humming sound you hear is the transformer under stress, and, if left connected, it too will die.

Sep 21, 2010 | Schumacher 10 Amp Fully Automatic/Manual...

1 Answer

We have no instructions for our charger can you please tell me how to use it?


your car battery has two connections called posts. one is negative and one is positive +. the red clamp from your charger goes to the positive terminal on the battery. the black clamp is supposed to go to ground, like an unpainted bolt but not brake lines or any kind of tube. It can be hooked to the negative or black battery connection as well. just make sure there is plenty of airflow around the battery and you should be fine. I usually do it that way and have never had a problem.. finally set your charger for 10 amps on a 12 volt battery and plug it in.

Aug 20, 2010 | Schumacher 10 Amp Fully Automatic/Manual...

1 Answer

Why is it making a humming noise


If it is humming ONLY when you connect it for charging and does not hum when you have no load on it...it has too much initial load and the humming is caused by an output current overload.
I don't know what you are trying to charge....if you are VERY careful and you can monitor the output current load....you may be able to get a charge....BUT BE VERY CAREFUL!

Mar 09, 2010 | Schumacher & Fast Charge Starter Charger

1 Answer

Schumacker battery charger problem?


You are charging. The meter corresponds to the level of charge in the battery. Try setting to 10 A for 4 hours, battery should be half-way up. To determine if battery id dead.. leave battery off charger once it is fully charged...test with a voltmeter after 10 min.....battery should still be above 12v...after1 hour it should still be above 12v...if not battery is spent.

Mar 11, 2009 | Schumacher & Fast Charge Starter Charger

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