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Danlane45 · 05-30-2020, 04:00 PM

I have a 2001 Monaco Diplomat. I have it in covered storage with shore power attached. The inverter/charger is an ME2512 and I just replaced it about three months ago. It shows it is float charging the batteries, but the DC systems, like lights, the thermostat and other things don't come on. I checked the batteries with a volt meter and they all show as charged. The DC items just don't work. I am going to buy a hydrometer and check the batteries, but they are only about a year or so old.

When I run the engine, everything works like it should.

Is there something that, when it fails, blocks the DC power from getting to the items it is supposed to power?

twinboat · 05-30-2020, 05:30 PM

Yes, the battery disconnect switch and solenoid.

There also should be a seperate lighter gauge wire on the house battery positive terminal that powers the house loads. Find it and follow it to a solenoid and or a fuse/breaker.

The inverter and boost start cables are larger.

JoeyAZ · 05-30-2020, 05:32 PM

I know you have probably tried this already, but did you check the 'salesman switch' just to the left as you enter the coach? I have a 2001 Diplomat, and other people can push that switch and you'll be chasing your tail.

Good luck - I hope it is something simple!

Joe

twinboat · 05-30-2020, 06:16 PM

Quote:

Originally Posted by JoeyAZ

I know you have probably tried this already, but did you check the 'salesman switch' just to the left as you enter the coach? I have a 2001 Diplomat, and other people can push that switch and you'll be chasing your tail.

Good luck - I hope it is something simple!

Joe

There is no switch marked " Salesman Switch ".

Unless he's been hanging on the site, he won't know what your talking about.

Its a Battery Disconnect, Use/Store or some other name, but not a salesman switch.

Danlane45 · 05-31-2020, 03:42 AM

I know the switch you are talking about...and, yes, I checked that, cycled it a couple of times and no go. I did chase my tail on that a few years ago and finally remembered it.

twinboat · 05-31-2020, 03:46 AM

Quote:

Originally Posted by Danlane45

I know the switch you are talking about...and, yes, I checked that, cycled it a couple of times and no go. I did chase my tail on that a few years ago and finally remembered it.

That switch controls a solenoid. Sometimes, although the solenoid clicks on, it doesn't make contact internally.

Jumping across both large terminals is a good test. If things work, jumped, its bad.

duckboatking · 05-31-2020, 06:25 AM

Hi,
So, I also have an ‘01 diplomat, I have heard lots of people on here talk of a salesman switch, but I thought maybe mine didn’t have one because I’ve neve seen anything like that. Since you have the same rig as me, any chance you could take a picture of this switch or tell me more where I could find it so I know it’s location as well ?
Thanks
Michael

Danlane45 · 05-31-2020, 04:03 PM

When you first start to enter, there are two switches. One is for the step lights and the other is the disconnect.

Danlane45 · 05-31-2020, 04:11 PM

I bought a hydrometer and tested all four batteries. On one, the bulb barely floated and did not float on the other three. I have a 10 amp, 12 volt charger, can I use that to try to charge the batteries? If so, do I need to loosen the caps in case they generate hydrogen gas? How do I hook them up, since there are four of them?

The batteries are Interstate that i bought at Costco. The label says RC:L 105, Ah@20 hr 210. The item number is 850284.

The label on the solenoid says:
White-Rodger BM
Type: 586-105111-3 COIL 12V D.C cont.
Cust No. 586-302