Question about Schumacher 10 Amp Fully Automatic/Manual Charger by

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Troubleshoot car battery charger

Turns on but does not charge the battery
indicator needle does not move to lower amp levels
fully charged light does not come on
how to find out the problem
how to repair
any general schematics or wiring diagrams for chargers

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  • kakl Dec 24, 2008

    I have the same problem. I have tested the ampere selector switch and the same to be continuity across every blade and it doesn't matter whater ampere it is set on. Could this be the problem?

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3 Suggested Answers

Thermo King
  • 593 Answers

SOURCE: is the 10 amp se-40ma battery charger to big for

A battery that might sit for a month at a time, would only need a trickle charge or about 1 amp, a charger of this type can stay hooked to the battery for the whole month. A 10 amp would be for a quick charge or only about 4 - 12 hours depends on how fast the battery lost the charge. A 10 amp charge would cook the battery if left for days.

Posted on Mar 26, 2010

  • 122 Answers

SOURCE: lost manual ...how long should i charge my riding

The SE40MAP has an automatic shutoff when battery is fully charged.

Posted on Jun 07, 2011

  • 122 Answers

SOURCE: I have a Schumacker Model

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.

Posted on Jun 07, 2011

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1 Answer

Needle jumps back an forth between charging and charged.


Did you try it on a different battery? These automatic chargers won't charge unless they detect a little bit of voltage and not a direct short. Your battery might be shorted out. Good luck, Al K

May 22, 2011 | Schumacher 10 Amp Fully Automatic/Manual...

1 Answer

I am trying to charge my cars battery but I am not sure where to put the 3 way switch.


Best solution is to use the Auto mode, since the unit will monitor the battery, and automatically switch to trickle charge when the battery is full. In the Auto mode, it won't overcharge the battery.

Feb 28, 2011 | Schumacher 10 Amp Fully Automatic/Manual...

1 Answer

Iam using Energizer 15min charger. I have used for a longer time. Now the charger red light blinks while trying to re-charge batteries. I have tried various batteries but red light blinks. Failed to charge...


A flashing light indicates that the charger seems to detect a problem with the cells. (two or more cells form a battery). Since you've tried other cells, it can be reasonably assumed that the charger is faulty and should be replaced.

Feb 14, 2011 | Energizer 15 Minute Battery Charger Combo...

1 Answer

15 min energizer charger cuts off after 5 seconds


Plug it into mains without battery.
Put the battery(s) into place. If batteries OK (but need charging) it will begin charging. If batteries very low it will cut off. If batteries charged it will charge only 1 - 10s.

Jun 07, 2010 | Energizer 15 Minute Battery Charger Combo...

2 Answers

Is the 10 amp se-40ma battery charger to big for my motorcycle battery can it over heat or over charge it


A battery that might sit for a month at a time, would only need a trickle charge or about 1 amp, a charger of this type can stay hooked to the battery for the whole month. A 10 amp would be for a quick charge or only about 4 - 12 hours depends on how fast the battery lost the charge. A 10 amp charge would cook the battery if left for days.

Mar 26, 2010 | Schumacher 10 Amp Fully Automatic/Manual...

1 Answer

Energizer 15 minute Ni-MH Battery charger


A flashing red light indicates that there's an error, or the batteries are defective.

No, the unit won't switch itself off once the batteries have been fully charged. The unit will start trickle charging instead.

Dec 24, 2008 | Energizer 15 Minute Battery Charger Combo...

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