Community Forums

prichmason · 05-28-2023, 01:30 PM

Greetings fellow RVers. We have a 2009 Monaco knight and are trying to figure out a series of electrical issues. If anyone has electrical diagrams I would be forever grateful if you could share them.
Secondly, I apologize for the longwinded description of my problems below.
Wife and I were sitting in RV, connected to 50 amp power when suddenly all the 12 volt lights went out. The water pump was out and everything else 12V but 120V items were working. My first thought was that converter was out and we had just used all the house battery power, but when I checked house batteries they had 13.5 volts. So I went to the front electrical fuse box and had 13.5 volts at power entrance. Continued to find power until I got to the electrical latching device (used for salesman switch at RV entrance) and I found 13.5V on input side and no power on output side. I read that these devices are failure prone (and perhaps even a fire hazard) so I decided to remove it. With all power off I removed the device and bolted the power cables on either side together. There was a small wire to the device which I removed and taped off.
When power was turned back on we had lights, water pump and initially thought problem was fixed, however, as we checked other interior 12V things it became clear there was another problem. The following other interior 12V things were found to not be working:
-no power to drivers, passenger, seats.
-no power to most of the under cabinet lights on both front slides.
-no power to 2 ceiling lights that are separately switched.
-no power to Weingart amplified antenna.
I have checked every fuse I could find in the internal fuse box (above drivers seat, the front fuse box and electrical connection boxes in the front drivers side basement (below drivers seat) and the rear electrical panel and found no issues (checked with meter for continuity)

At this point I am scratching my head on the next steps due to the variety of no power locations. I am certain those items were working immediately before this fiasco.
I would be grateful if you could share your thoughts on possible causes or next diagnosis steps
Thanks so much! Paul

Jim_HiTek · 05-28-2023, 01:50 PM

Well, ya got yer house batts and ya got yer chassis batts and what circuits you mention as not working are yer chassis batts.

Many times there are 2 salesman's switches. One fer the house and one fer the chassis batts. So make sure that if you do have both, that the chassis switch is on to.

153stars · 05-28-2023, 03:20 PM

Driver and pass seat are on chassis. I have fuses in front electric bay. I think your year has rear fuse / electronic box as well as front.

prichmason · 06-01-2023, 03:08 PM

Update, As I mentioned earlier when I removed the Latching device operated by the salesman switch I bolted the 2 red leads together. Wrong thing to do. When I removed electrical tape and bolt/nut and reattached the two wires to a lug called unswitched power everything that had stopped working began working again.

RamiDav · 06-01-2023, 07:37 PM

It does seem odd. Were the 2 red wires you taped together the only wires beside the small wire?

prichmason · 06-01-2023, 08:40 PM

Yes. my assumption is that some of the circuits were "switched" via latching device and some were "unswitched" IE not shut off by latching device (salesman switch). Not sure how this was accomplished considering wiring but thinking I missed a wire that went from powered side of device to "unswitched" lug on panel

YC1 · 06-02-2023, 04:27 AM

Sure does not quite add up but glad it is fixed. A few pictures of the area in question would clear things up a bit.

portopa · 06-03-2023, 08:55 AM

Quote:

Originally Posted by prichmason

Greetings fellow RVers. We have a 2009 Monaco knight and are trying to figure out a series of electrical issues. If anyone has electrical diagrams I would be forever grateful if you could share them.
Secondly, I apologize for the longwinded description of my problems below.
Wife and I were sitting in RV, connected to 50 amp power when suddenly all the 12 volt lights went out. The water pump was out and everything else 12V but 120V items were working. My first thought was that converter was out and we had just used all the house battery power, but when I checked house batteries they had 13.5 volts. So I went to the front electrical fuse box and had 13.5 volts at power entrance. Continued to find power until I got to the electrical latching device (used for salesman switch at RV entrance) and I found 13.5V on input side and no power on output side. I read that these devices are failure prone (and perhaps even a fire hazard) so I decided to remove it. With all power off I removed the device and bolted the power cables on either side together. There was a small wire to the device which I removed and taped off.
When power was turned back on we had lights, water pump and initially thought problem was fixed, however, as we checked other interior 12V things it became clear there was another problem. The following other interior 12V things were found to not be working:
-no power to drivers, passenger, seats.
-no power to most of the under cabinet lights on both front slides.
-no power to 2 ceiling lights that are separately switched.
-no power to Weingart amplified antenna.
I have checked every fuse I could find in the internal fuse box (above drivers seat, the front fuse box and electrical connection boxes in the front drivers side basement (below drivers seat) and the rear electrical panel and found no issues (checked with meter for continuity)

At this point I am scratching my head on the next steps due to the variety of no power locations. I am certain those items were working immediately before this fiasco.
I would be grateful if you could share your thoughts on possible causes or next diagnosis steps
Thanks so much! Paul

I just joined Monacoers.org. Their download section has the mother lode of drawings for Knights/Ambassadors/Endeavors, and others. Description of their "2009 Knight Wiring Diagrams 1.0.0": "2009 Knight schematics and plumbing diagrams. For individual schematics select DOWNLOAD in the upper right of the screen and then download individual schematics of interest.
For a complete set (217 pages) download the file below."

You can download one big PDF containing all 217 pages (fast, just 26MB), or download the pages individually (takes forever, but easier to organize in your own folders).