Paul, it should not be a problem to charge it either way, though if the battery is really dead, and has no charge at all, it might be better to use a separate charger to charge it for the first time and then maintain it thereafter to keep a charge on it.
There is a file in the Files section of the forum that shows how the electrical system works. AA_Electrical
It is useful to buy a small multimeter for checking your battery and troubleshooting problems. I would try plugging it into shore power and see if that does charge the battery. The worst that can happen is that one of the fuses in the converter assembly distribution buss will be blown because of a heavy current demand.
How did you check to see if the battery did have a charge, or if it was due to a blown fuse or open circuit breaker?
If you have specific questions, contact me by using the "Send email" option beside this message.
Jerry J
----- Original Message -----From: Paul ArnoldSent: Monday, November 01, 2010 6:28 PMSubject: [tabtrailers] Using shore power or charge by Tow Vehicle when T@B battery deadI think I read something about this on the forum recently, but my search reveals nada. Thus I ask: Our T@B's newish battery has no charge -- do we run any significant risk of damage to trailer components if we either (a.) connect the T@B to shore power or (b.) pull the T@B behind a tow vehicle that is wired to charge the trailer battery? I'm pretty ignorant when it comes to things electrical. ~Paul Arnold
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