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Old 03-23-2023, 09:39 AM   #1
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Monaco Diplomat dash

I have a 1998 Monaco Diplomat. My engine oil pressure gauge is not working. I replaced the sending unit on the 5.9 cummins engine but did not fix the issue.
I am planning on removing the dash to get to the gauge but it seems glued down? How did you remove it without ruining the whole thing? Or is there a different route I should go? thanks for any help.
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Old 03-23-2023, 09:48 AM   #2
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My dash and ~20 screws holding in place placed along the outside edge. I removed each screw and then gently pried the dash out. If yours seems stuck you may have to get/make a tool to get behind the edge and pry it up.

Be careful, there is a good chance you will crack the dash. Also pretty good chance the gauge is obsolete, I know mine are. Do you have a plan on what to do if you can't replace with same gauge??

Personally I don't even use my gauges anymore, I bought a Silverleaf VMSpc monitoring system and all the important parameters are displayed on a small tablet. It is much more responsive then the gauges. I can setup alarms, and also data log any that I want. Works great. There are other options, Scangauge, Silverleaf, and the most recent is Bluefire.
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 03-23-2023, 09:59 AM   #3
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Thanks for heads up... ya I am worried about prying up the dash ..
How does the system you have hook up to my engine?
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Old 03-23-2023, 10:07 AM   #4
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I also figured it is a 5.9 Cummins so I would think I can find a gauge that would work...?
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Old 03-23-2023, 11:12 AM   #5
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Good morning Snodz7; As Jim mentioned, you have to treat the dash panel with kit gloves. As that plastic ages it gets brittle. Just don't rush things and easy as you go. On some Cummin's engines there are 2 oil pressure sensors. One provides info to the ECM and the other to the dash gauge and warning system. Do not know if your engine has that feature. You can create an account with Cummin's Quick Serve and have access to all the info on your 5.9 with just providing your engine serial number.

Jim has a Silver Leaf system for his coach as I have one for my 01 Windsor. The systems gets it's info from the engine diagnostic port under the left side of the dash. That is where most of the ports are located on Monaco coaches. You get so much more info than what the dash gauges give you. There are a number of these systems out there. Start checking online and there should be a wealth of reading and research for you. Have a great week!
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