Battery Problem with 2008 Winnebago Vista

[joycemiddle]

I could not crank the motorhome without using the booster. I charged the battery and it would not take a charge. I bought a new battery. Now, I don't get any power from the battery without pushing the booster switch to crank. The starter won't even click without the pushing the booster switch......HELP has anyone had this problem?

[GaryKD]

Hi joycemiddle,
How comfortable are you with taking measurements with a meter?
1. Is the battery connected correctly?
2. Disconnect the battery and take a DC voltage reading across the terminals. If the VDC is not 12.6 or more, you will need to charge the battery. Consider charging the battery while it is disconnected. A good charger will take 24 to 48 hours to fully charge a dead battery.
3. With the battery fully charged, reconnect the cables and try to start the coach.
4. If the battery drains quickly, you'll need to take the coach to a dealer and have them check out the AMP draws on the battery. Sitting and not being used, the chassis battery should be fine for several months.

All this assumes you have turned off all the automotive appliances that can draw down the chassis battery.

[tompen]

So you basically have the same symptom with the new battery. It really sounds like a connection problem. Start with the ground wire from the battery. Then follow the positive wire from the battery to see where it parallels or connects to the boost (isolator) relay. The problem should be close to the battery.