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SE-4020 won't charge. Fan comes on but nothing else. Was using 40 amp charge and then went to boost. 40 amp showed it was charging by the gauge. Now nothing no sparks or anything. I don't see a fuse. Any ideas how to troubleshoot?

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Posted on Jan 02, 2017

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SOURCE: Schumacher 2/10/50 amp charger,125/225 amp starter

It could be an internal fuse, or that the transformer is malfunctioning.

Before any dis-assembly/internal inspection, be sure that the unit in unplugged.

Good luck...

Posted on Feb 25, 2009

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I would check Mcmaster Carr online and search for part # 7178K14. This is a pair of 200 amp clamps for around $8.00. I use this business all the time. They ship really really fast. Good luck

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