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Old 12-12-2021, 01:35 PM   #1
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Unhappy 2001 Monaco Diplomat Power Issue

Group. Good afternoon from here in Indiana. I am a newish owner of a 2001 Monaco Diplomat. Two days ago, I had the rig running under its own power just ahead of the recent storms. We unplugged shore power. Once the storms passed, we attempted to start the rig and noticed the front step wasn't coming out as we opened the door. No dash lights and nothing happening once the ignition was tried. Batteries have juice at 12.72 and dip within range under a load at 10. That is where my trials stop currently. Am I missing something like a chassis power switch or a breaker that may have popped? Any information would be greatly appreciated. I am to be headed to NC for Christmas on Friday.
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Old 12-12-2021, 03:08 PM   #2
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How old are the batteries? If they dip that low under a mild load, then chances are they are toast. I just had to replace the battery in my Jeep for the same reason. The resting voltage was 12.5 which is low, the lights and radio worked but there wasn't enough amperage to even cause the starter solenoid to click.

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Old 12-12-2021, 03:22 PM   #3
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This happened to me, it ended up being the chassis battery disconnect. Took a voltmeter and didn't have any voltage from the disconnect switch. took the two leads and bolted them together until I could replace.
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
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Old 12-12-2021, 04:00 PM   #4
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Location: FL
Posts: 11,175

You will find a tremendous amount of information here and a deep talent pool.

Did you push the emergency/aux start button while trying to start the RV?

That should combine the battery banks. Assuming all the parts are up to par.

Since your steps are not acting correctly they should perk up when you hold the emergency start button down with the ignition switch turned.

If you didn't even get a grunt out of it you have battery issues or the battery cutoff switch is indeed bad. But you state the voltage at the battery is dropping to around 10 volts so the switch is not a likely culprit.

If you do not have confidence in the emergency start button working you can use a single jump start cable to connect the battery banks together.

You need to understand how to connect them carefully.

One last item. Some side radiator RV's have rear engine start switches and it is common for folks to forget to put them back in the proper positions.
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008

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Old 12-14-2021, 04:57 PM   #5
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Just went through this with my 2003 dynasty, it's the relay. There were a bunch of bad relays made. My wires were melted to the 14 pin block they were in. Had to cut the wires and put spade connectors on them. Not happy with my monaco piece of junk money hungry monster. Walls delaminating, those slide locks tearing the seals and aqua hot system is a real pain and expensive to have work done on it IF you can find a computer person that knows what they are doing and they are not all over the place. So you want to go to a certain place in the country for a season, better check for an authorized service person in the are or you could be in a mess. What you gonna do if your aqua hot quits on you and you happen to be in need of heat?
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diplomat, monaco, monaco diplomat, power

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