dual batteries drain quickly
Dual 12 volt batteries drain and are dead within 6 hrs. Everything seems to work correctly boondocking and on shore power. while boondocking the batteries will go dead within 6 hrs. I put new batte...
Forum Discussion
shane102.sc wrote:
BFL, I think that is the problem. Here are the results of my tests:
No connections battery volts=12.45, all wires connected=12.38, with shore power=13.20 at battery and at converter= 13.57, here is where it goes wrong I think. Truck battery not running=12.75, when running truck battery volts= 14.87. When I plug camper to truck with truck running the volts = 12.37 and over 5 minutes of running the volts dropped to 12.25. Volts should be rising. Any ideas on what is causing volts to drop when plugged to truck for charging.
Not a clue! Guys who know trucks might. What sort of truck is it? Especially does it have two batteries- one being "auxiliary", and does it have an isolation relay like a Ford does or is the connection open always like with a Chev?
Do you connect with the "camper" one behind the cab or back to the bumper 7-pin? Perhaps there is a short in one of those that acts when you plug in the camper, but is not bothering the normal alternator charging with the truck's own battery when the camper is not connected.
OR--is it the camper's plug??? OR do you have an extension cord that goes from the camper's plug back to the bumper 7-pin, and that is the culprit?
I had the bumper 7-pin go all corroded inside on our Chev. Had to replace it with a standard one. Wiring colours were goofy, but there is a website that shows the different wire colours for Chev, Ford, Dodge 7-pins.
