I’m not great at electronics so advice is welcome but don’t assume much.

The trailer is plugged in at the house and normally if it is charging I’m reading north of 13 volts. Batteries in parallel and I read across them. I AM getting 110 and the converter seems to be functioning as fan and lights run. Of course, I guess I do t know that for sure without disconnecting battery. Battery reads 12.59 being plugged into shore power. However, when I hook my battery minder [ 3 amp) I’m getting over 14, which seems right.

1. Is it common for a converter to loose just the charging function?

2. What is a good step by step approach to checking what Elise it might be?

Thanks

Rick

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2201 TL

2010 Nissan Titan king cab SE
4x4