No 12 volt Power unless on Shore Power or Generator
We were boon-docking. When we shut down the generator for the night, the 12 volt lights got dim immediately, so I assumed the batteries were bad (5 years old.) I replaced them with two 27 series deep cycle batteries. Ever since then, when the genny is on, the 12 volts lights are on, when genny is off the lights are off.
I have read half-a-dozen posts with same problem. I have performed all the recommended tests. Everything checks out except we have no 12 volt power with genny off. We have 12.6 volts on battery side of reset fuse, 12.6 volts on opposite side of fuse, jacks and slide work, lights, pump do not. I checked power at converter. 14.4 volts with generator on, 0.0 volts with genny off.
Battery disconnect switch, 30 or 40 amp reverse polarity fuses or the resetable breaker/fuse near the battery on the positive cable.
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, seasonal since 2000
Car Shredder Op/Tech, Scrap Metal Recycling - retired
The Faster I Go, The Behinder I Get.
I have checked battery disconnect switch, reset switch, both 40 amp reverse polarity fuses. All are good. There is no power at the 12 volt side of the converter unless the generator is running. When it is, power measures 14.4 volts. When it is not, power measures 0.0 volts. I have 12.6 volts at the jacks and slide and the lead going to the converter.
The new batteries are working, but the power from them is not reaching the 12 volt side of the converter. Battery disconnect switch is OK. Battery reset switch is OK. I Measure 12.6 volts going to wire that leaves the reset switch headed for the converter, but no voltage arrives at the converter. I’m wondering if there is a component inside the converter that is not letting the current through.
the fact that you are getting 14.4 vdc at the converter when connected to 120 vac (shore, generator) says your converter is working. what is the voltage at the battery when the converter is working? if it not 13.2 or above there is a break in the cable path from the converter to the battery.
the break could be the battery disconnect switch in the wrong position or the resettable circuit breaker has tripped. it could be a loose or corroded connection somewhere. it could be unseen corrosion inside a battery cable.
time to get the meter back out and use it to trace the battery cables and test each and every connection to see where you lose power.
2015 cardinal model 3825fl
2015 dodge ram 3500 dually
Herk, I havenít seen the current limiter. I will check for it next time I am in camp (2-3 weeks from now.) Camper stays there full time, 200 miles from home.
I had a similar problem and wire brushing the current limiter solved my problem. If it is badly corroded, you may need to replace it. I think they are 30 amps.
They are resettable if it is just tripped. There is a button on one of the short sides that can be pressed in if it is popped.
The reason that limiter is there is to protect the battery from a dead short if the umbilical is cut or severed by rubbing on the road or in a jack knife. one wire goes to the battery and one goes into the metal box where it joins the wire from the converter and the hot from the truck. Opening it isolates the battery.
A similar one is on the frame of travel trailers right near the metal umbilical box on the frame.
Lou, Laura, & Freya the wonder dog
2008 GMC Sierra 3000HD Crewcab SB Allison Duramax
2019 Flagstaff 8529FLS - Pullrite 3300
HAM CALLSIGN - KC3FFW
The positive battery cable will directly connect to the positive converter cable and positive terminal on the distribution board. Not always the case for the negative wiring. On some units (e.g., our Cherokee 38P), the negative battery cable connects directly to the frame. A positive cable from the distribution board connects to the frame, about four feet away from the battery cable. If either of these ground connections goes bad (and mine were rusty), there goes the power.
Sticks and Bricks: Raleigh, NC
2008 Cherokee 38P: at Ivor, VA permanently