Author Topic: Volt gauge bounces at idle  (Read 617 times)

Rick Vyncke

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Volt gauge bounces at idle
« on: January 08, 2022, 06:40:52 PM »
On a 2004 Beaver Marquis, the volt gauge bounces between 14v and 16v at idle (600 rpm). Alternator completely rebuilt.  New batteries (both Coach and chassis).  Gauge is steady when rpm increase to 900 RPM’s or above. 

Is this normal?  Any suggestions. 

Leece Neville alternator has a sense wire…. Can anybody tell me where the other end of that wire connects?   It’s not directly to the batteries.  I was told to check connections to ensure they are good.   Good on back of alternator but don’t know where the other end is.   
Rick V
2004 Beaver Marquis, Garnet (3 slides)
43'
C12

Eric Maclean

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Re: Volt gauge bounces at idle
« Reply #1 on: January 08, 2022, 07:17:41 PM »
Rick
Your sense wire may go to the battery isolator ( blue finned thing under the bed.

Eric
1997 Patriot Yorktown
3126-B
2009 Chevy HHR
Roadmaster falcon tow bar
Demco Air Force one tow brake.

Steve Huber Co-Admin

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Re: Volt gauge bounces at idle
« Reply #2 on: January 08, 2022, 10:30:12 PM »
Rick,
Also check that the 12V cables in the rear run box are tight. I had similar sympoms and found a cable a bit loose.
Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp

Rick Vyncke

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Re: Volt gauge bounces at idle
« Reply #3 on: January 08, 2022, 11:30:11 PM »
Steve,

Where would I find that?  Is that the box just above the battery switches?
Rick V
2004 Beaver Marquis, Garnet (3 slides)
43'
C12

Bryan Beamon

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Re: Volt gauge bounces at idle
« Reply #4 on: January 09, 2022, 12:21:28 AM »
Rick, check the cables on top of your Big  Boy battery isolator to make sure they are tight in the run bay that Steve suggested. Yes it is above the battery on off switches. See attached photo of your Big Boy
C & Bryan Beamon
2006  to present
2007 Contessa 42ft Cat C-9 400hp
1996 to 2006 97 Beaver Patriot Camden

Rick Vyncke

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Re: Volt gauge bounces at idle
« Reply #5 on: January 09, 2022, 12:30:43 AM »
Thanks Brian
Rick V
2004 Beaver Marquis, Garnet (3 slides)
43'
C12