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Old 06-15-2015, 12:55 PM   #1
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Front Electrial Ground - Where is it located?

Need help, please.
I have a 2000 Monaco Diplomat - 36 foot.
My instrument cluster isn't working properly on a regular basis. The problem is the speedometer fluctuates, the temperature guage reads hot by 10 to 15 degrees and the fuel gauge is half right. Several technicians (over the phone) have suggested I check the ground. In the front firewall, I can find the hot post but cannot seem to locate the ground post. Does any one have an idea of where it might be. There is a lot of foam insulation and I wonder if it might be covering it. Any suggestions on where it could be?. Without tearing off the foam, I am at a loss.
Thanks to anyone who cares to respond.
Ed F
In Virginia
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Old 06-15-2015, 02:42 PM   #2
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Why not try running a new ground from the chassis to the instrument cluster? Might do the trick.
Jake & Sarah, US Army Retired
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Old 06-15-2015, 03:36 PM   #3
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Many later model vehicles no longer use the chassis for an active ground. They run a separate ground wire to each device and tie these together thru eliminating the old problems.

With that said, often there is a voltage regulator supplying your instruments. When it goes bad, all gauges act funny.

You really need a schematic to determine how the system is setup.

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Old 06-15-2015, 03:58 PM   #4
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Front Electrical Ground - Where is it

So far, I have tried running a ground from the speedometer to the bolt on the air brake pedal and it didn't correct the problem.

I have contacted Monaco about a schematic/wiring diagram but they have not responded yet.

I did not know about a voltage regulator on the 2000 Monaco. If I can get a schematic maybe I can figure out whether or not it has one and where it might be.

Thanks for your suggestions.

Ed F
2000 Monaco Diplomat 36
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Old 06-15-2015, 04:03 PM   #5
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Ed on the 2000 Dip the ground bar is behind the dash on the driver side it's about 1 ft long and the only way I know to get to it is remove the dash and when you get to it it may not help you The early Monaco coaches had a crappy ground, have you noticed that when you turn on the lights the gauges go crazy. The simplest soulation is to forget about the Monaco entertainment center and invest in a VMSpc from silverleaf that you can set up the gauges, speedo, odometer ect like you want them , do a search for Silverleaf. I got tired of fooling with the crappy gauges in 01 and been using the VMSpc ever since and totally happy with it.
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Old 06-17-2015, 09:16 AM   #6
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Thanks Jake and Sarah,

I tried running a wire from the speedometer ground to the bolt on the break peddle which is mounted to the frame with no luck. My next attempt is to run a wire straight from the battery to the speedometer ground in the next couple of weeks. We'll see if that helps.

Ed F
2000 Monaco Diplomat
in Virginia
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Old 06-19-2015, 05:43 PM   #7
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When I phone Monaco in Oregon and ask for a wiring schematic they email them to me right away and the best ones are the ones you need auto cad to open them and then I hook up my labtop to my big screen tv.
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