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Old 02-05-2018, 10:59 PM   #43
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Monaco Owners Club
Join Date: Nov 2016
Posts: 216
I thought my alternator was bad and it turned out to be the battery isolator. $85 and 10 minutes to swap it out. Just saying
Scotia, Tricia, Mia, (the Labradoodle)
1999 Monaco Dynasty
330hp Cummins, Allison 6 speed
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Old 02-06-2018, 05:51 AM   #44
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Join Date: Sep 2012
Posts: 8,055
Finally changed the battery in my 2008 P/U this year. Would not reliably start after sitting 2 weeks a couple of times. Been flat 7 or 8 times over it's service life. Was still starting if I drove the truck once a week but I don't always do that.
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Old 02-06-2018, 05:54 AM   #45
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Join Date: May 2015
Location: Chatsworth, CA
Posts: 357
Final update

As we hare received a great deal of help over the past two years, we like to (at minimum) post the solution (or resolution) to whatever problem we're having during this long restoration...

In this case, the culprit was ultimately, as several people posited, simply bad chassis batteries. We replaced them and...not only did the issues we were having go away, we saw a marked improvement in several other areas of performance, including startup.

I'd like to add a special thanks to all the people who offered additional information on battery testing, etc. That was INCREDIBLY useful info, which we did not know much about, and we have saved it in our local files.


In 2018, roughly 900 watts of solar to start. Along with that will come a bank of new house batteries and other improvements, plus Bilstein shocks all around along with a likely steering gear replacement. Then, in 2019, cosmetic fixes and some mechanical ones, too, most probably a new trailing arm installation in Oregon.

Onward and upward! Thank you for the kindness and support...we appreciate it greatly.
Full-Timers Since 2015 - Still Working From the Road!
1999 Monaco Diplomat - Cummins 275hp ISB - 2004 Jeep Grand Cherokee Laredo - Roadmaster Sterling All-Terrain Tow Bar - Roadmaster InvisiBrake Supplemental Braking System
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alternator, batteries

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