Originally Posted by Blacknchromehd
Question.....I thought being plugged in during the winter Would keep my chassis batteries fully charged but I was wrong....house are fine...should I install a battery charger that works of the house ones to keep the chassis fully charged?
There is a small device in the house battery compartment, battery isolation manager, that should be splitting off a small charge to the house batteries. While doing general maintenance on my rig I noticed slower engine cranking than I like to hear even though we had been on the road days before. I disconnected, cleaned, and fully tested the house batteries, they were junk. I have little faith in those OEM Alliance batteries so I replaced them. Would not have been worth my time to take them to Freightliner since the Mfg. date on the batteries was out there a bit. After hooking up the new batteries I connected a shore power line and found that the chassis batteries did in fact receive a trickle charge.
After all that blather, hopefully you don't have a fuse or bad connection preventing your chassis batteries from receiving a charge. I would seriously scrutinize the batteries first.