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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4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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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