Connecting Battery Kills 12v System
Maybe this has been answered already, if so maybe someone can point me to the post. We're on a 3 week cross country trip with the kids in a 31' Jayco travel trailer. Had our battery system give us...
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jfeltham wrote:
Could an electrical problem with the trailer battery pull down the tow-vehicle battery?
You were likely operating off the tow vehicle all along. There is a connection through the trailer connector to charge the trailer battery while towing.
The phrase "brand new battery" translates about 50% of the time to "electrical system problem" to me. A new battery is often the first thing changed when there is a problem, and things will work for a while because the new, charged battery covers for the rest of the system.
You might want to check your tow vehicle fuse for the trailer 12V line. Then start by measuring the battery both connected to the trailer and unconnected.
