Forum Discussion

MarineandAirfor's avatar
Nov 20, 2014

DC side issue Coach Batts not charging

When I purchased the coach was told batts were good. I had AC power plugged in but no DC. Control panel didn't give lights, no genset crank and so on. I figured I'd do the most obvious things first. Swapped out the batts with newer fully charged ones from my boat. Also in doing that I wire brushed every possible connection to shiny copper. Figuring this would address 2 possible issued (dead batts or corroded connections) well I still had no DC. I thought it may have been a bad master solenoid relay that was in the batt bay under the steps. However after cleaning it up like new I broke off a terminal putting it all back together. This is the item
Before I took it off and cleaned it. So after not being helped my any Napa or any other place I went to an RV place 45 min away. They gave me what they called a continuos duty solenoid. Which looked like a standard starter solenoid and looked nothing like what I wanted. But I assumed he knew more than me and would be a generic replacement. After it was installed I still had NO DC and was puzzled as I knew I now had full batts, clean terminals wires and connections and a NEW solenoid. After doing some research found some just bypass the darn thing so I did and what do u know I HAD ALL MY DC WORKING! I was a happy camper feeling accomplished. I worked for a week inside the coach late nights not plugged into shore power. I eventually plugged in to make sure I was charging or topping off the batts.
Well last night I went out there and had no DC so I'm guessing the bypass was also bypassing charging??? I don't know but I'm bringing that thing back and getting a direct replacement relay/solenoid. The one I need has some small wires with blade fuses
  • The photo is of an electrically operated mechanically held relay like similar to this one.
    Battery disconnect
    The condition of the relay in photo may just need cleaned up. Photo maybe sufficient to remove it completely clean it up and re-install. I would also make a drawing so as to get wiring back correctly.
    Some of the relays have fuses on the upper side where the control wires arrive from remote location.
  • Sounds like your battery charger is not working when connected to AC shorepower. You worked many nights without being plugged in and ran the batteries down. JMO