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Usmcsousa's avatar
Usmcsousa
Explorer
Mar 21, 2014

Warm ground wire at batteries, no start Gen.

Hi everybody,
yesterday evening I tried starting up my generac 6kw generator and it wouldn't fire up.
my 95gulfstream class a was running and both chassis and house battey switches were on. Each time I attempted to turn the genset on, my headlights and house lights would dim significantly.
I made sure the AC and fridge were off to reduce the load on the genset and checked all breakers and fuses.
I decided to check voltage on my two group 27 house batteries and it read at 12.86 volts. But I noticed the black ground cable connecting the coach to my battery bank was warm/borderline hot. My red cable was cold to touch.
since it was dark and late, I disconnected my battery bank and shut the coach down for the night.
anyone have any ideas or suggestions for me to go from here?
the two issues may not be related but I figured I'd ask folks smarter than me what my next steps should be.
thanks all.
  • OnaQuest wrote:
    If the battery ground cable was getting warm (hot) you can bet it has a bad connection at that point. Check the cable terminal ends where it enters the insulation. If you see any green oxidation, replace the cable.
    X2 I had a bad connection between the cable end and the battery connector into which it was inserted.
  • If the battery ground cable was getting warm (hot) you can bet it has a bad connection at that point. Check the cable terminal ends where it enters the insulation. If you see any green oxidation, replace the cable.
  • Tom_M wrote:
    Sounds like a bad ground connection. Disconnect your cables and clean the connections.

    the batteries are both 2months old. And I cleaned the cables before they were installed, no rust/corrosion that I noticed last night on either cables or batteries. And my wing nuts were both tight.
  • Sounds like a bad ground connection. Disconnect your cables and clean the connections.

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