Raspy Posted February 11, 2018 Author Share Posted February 11, 2018 Well, that is a good question. If you are maintaining the battery, you are charging the battery. Not sure what he means. I went from the system not being hooked up, such that no charging of the trailer battery could occur, to charging just fine. But it seems that different brands and models of tow vehicles have different amounts of power they will send to the 7 pin plug. I guess you'll just have to test it to see how much you are getting from your tow vehicle. First, verify that it is charging by looking at the voltage in the trailer, while plugged into the TV, and engine running. Should be up at about 14.1 if your battery is already charged. Then turn the fridge on 12 volts (assuming you have the absorption fridge). This will put a load of about 150 watts, 12 volts, on the system. Does your battery voltage hold at 14.1? If so, you are good to go. If your battery does not come up to about 14.1 while the TV is connected and running, but languishes at about 12.6 and then drops further when the fridge is turned on in 12 volt mode, you are not charging from the TV. I think I'd call Oliver back and ask what they mean by "maintaining". Does that mean it will charge from the TV, or not? Remind them that there are conflicting stories from Oliver about trailer charging from the 7 pin plug and that the problem was supposedly fixed back around Hull # 200. Then it turned out that Oliver was trying to run the brakes by grounding through the tow ball and that some of us have had to sort this out on our own. Also, if you get a "trailer disconnected" type warning in your truck, it could mean you are not connected for charging and have no ground wire to the trailer frame and battery. Let me know what you find out next. John John "I only exaggerate enough to compensate for being taken with a grain of salt." LE2 #92 (sold), Black Series HQ19 Link to comment Share on other sites More sharing options...
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