No charge from tow vehicle
We just took a quick trip to Cades Cove. No hookups in campground so we run off batteries. I checked the battery voltage before we headed home and again when we arrived. It appears that I had no charg...
Forum Discussion
theoldwizard1 wrote:Katdaddy wrote:ppine wrote:
Experience suggests that it is difficult to rely on your truck alternator to being your batteries on your trailer back up to full charge.
I wasn't expecting full charge. But I was expecting some charge.
Maybe yes, maybe no.
Try the following test. Disconnect the positive lead to the house battery. Measure the voltage of the house battery bank. Plug the trailer into the tow vehicle and start the tow vehicle. Have some one hold the engine speed at high idle (about 2000 RPM). Check the voltage at the disconnected positive lead and ground.
If you are LUCKY, the voltage will be above 13.0V. Good, but not enough to charge the batteries. You need a minimum of 13.8V and even that is really low. Cleaning all of the contacts, including grounds will help a little.
Read this DC-DC Battery charging
Right on the money
