![]() Set the meter to read 12-VDC and place the negative test probe on the negative battery terminal and the positive test probe on the positive battery terminal. A more accurate method is to test the battery using the multimeter. Note: If you check the reading at the monitor panel when the RV is plugged in to electricity it will give you fully charged reading. To get an accurate reading make sure the RV is not plugged into electricity and turn on a couple of overhead lights to place a small load on the battery. You can use the monitor panel in the TV to check the condition of the coach batteries. There are a couple of quick way to test the coach batteries. If not the first step is to verify the coach battery or batteries are charged enough to supply power to the 12-volt devices in the RV. ![]() Something might jar your memory resulting in a quick fix to the problem. Were you working on or around something else that could have affected the operation of the water pump? Try to think of all possible scenarios. Did you leave the RV for a period of time with the pump on? Is there water in the fresh water holding tank? With the pump turned on try opening a faucet to see if the pump starts running. Now, try to determine the last time the water pump actually worked. If you are aware of any inline fuses used on the 12-volt devices in your RV keep these on hand too. Check the amperage of the fuses used in the power distribution box and keep an assortment on hand. You should also keep some electrical tape, various size wire nuts, 12-volt light bulbs and 12-volt fuses on hand. For starters you will need a couple of basic tools to assist in troubleshooting your RV’s 12-volt DC electrical system.Ģ) A digital multimeter that can test 12-volt DC electricity.īoth of these are available at local auto parts stores. I am convinced that just about anyone can troubleshoot a 12-VDC problem, and in many cases repair the problem without it ruining your camping trip. So what do you do when one of these 12-volt items quit working?įor the sake of an example let’s say we are dry-camping and our 12-volt water pump quits working. When you go camping you rely on these 12-volt items to operate properly, especially if you are dry-camping without hook-ups. These 12-volt devices include overhead lights, the water pump, vent fans, furnace fan, range hood fan, LP gas leak detectors, stereo, 12-volt TVs and the refrigerator when it is operating in the LP gas mode. ![]() 12-VDC electricity is stored in the RV batteries and supplies power to components, devices and appliances that operate on 12-volt DC electricity. DC electricity flows in one direction, from negative to positive. ![]() 12- volt DC or Direct Current is electricity supplied by the RV batteries. Today we’re going to concentrate on troubleshooting a basic 12-volt DC coach electrical system problem. The 12-volt DC automotive system, the 12-volt DC coach system and the 120-volt AC coach system. RVs have three different electrical systems. ![]()
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