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Old 07-28-2016, 03:21 PM   #41
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Originally Posted by mkersic View Post
Our camper is wired for 50amp in case we later want to add a second A/C.
But the campground does not offer 50amp service to the seasonal sites.
I've not had problems with 30amps except on the holiday weekends.
Ah, do you have your own meter or is electric included with your site?
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Old 07-28-2016, 05:58 PM   #42
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Originally Posted by PoconoFun View Post
Here's a picture of the back of the tank panel numbered #1 (red) to #6 (blue).
I only have connectors #1-4 and 6 with a wire going to it.

I know that #1 and #2 are 12v and GND.

I have black, grey and fresh water which is #3, 4 and 6. So you must have a 4th indicator.

As far as my connector comparing to yours, my color coding is exactly the same save the #5 connector.

I will look more into this for you.
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Old 07-28-2016, 08:26 PM   #43
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Originally Posted by TakeItEasy View Post
Ah, do you have your own meter or is electric included with your site?
There is a meter and I do pay electric.
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Old 07-28-2016, 08:28 PM   #44
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Originally Posted by dea49 View Post
I only have connectors #1-4 and 6 with a wire going to it.

I know that #1 and #2 are 12v and GND.

I have black, grey and fresh water which is #3, 4 and 6. So you must have a 4th indicator.

As far as my connector comparing to yours, my color coding is exactly the same save the #5 connector.

I will look more into this for you.
I have 5 lights: black tank, 2 gray tanks, fresh tank, and battery.
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Old 07-28-2016, 08:41 PM   #45
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Originally Posted by PoconoFun View Post
I have 5 lights: black tank, 2 gray tanks, fresh tank, and battery.
Your red and white are used for the battery, so the black wire may be the other grey tank.

I found this on another site from 2010. It came with an attached pdf. Would you like me to PM you the .pdf?

QUOTE:
In response to your inquiry, I have attached a file of the M21 wiring diagram, and suggest you make the following tests to determine the source of the incorrect tank readings.

First, remove the monitor panel insert to gain access to the monitor circuit board. There will be a red header connector plugged into the circuit board with 5 wires; we will be interested in the brown wire. Follow the brown wire to where it connects to the coach wiring harness, and disconnect it at this point. Check the monitor panel black tank level, it should read empty.
If the display is something other than empty, the circuit board is defective. If the black tank reads empty, reconnect the brown wire to the wiring harness, and move to the black tank.

With the black tank empty, disconnect the resistor network yellow, green, and orange wires from the level probes, and isolate them from one another. Check the monitor panel black tank display, it should read empty. If the reading is other than empty, there is a leakage path in the coach wiring harness between the monitor panel brown wire connection and the resistor network red wire connection to the coach harness.

If the black tank reads empty, ground the yellow wire to the white ground wire connection on the tank, the black tank level should read 1/3. Next, remove the yellow wire from the ground probe and connect the green wire to ground. The monitor panel should now read 2/3. Next, remove the green wire from the ground probe, and ground the orange wire. The monitor panel should now read full. If the above responses are correct, the monitor panel circuit board, coach wiring harness, and resistor network are functioning as designed, and the problem is a residue buildup inside the black tank. The remedy is to replace all the tank probes with new.

Please contact me with any questions.

Sincerely,

Terry Garl
Service and Warranty
KIB Electronics
(574) 262-0518
END QUOTE

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Old 07-28-2016, 08:46 PM   #46
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Yes please. Thanks so much!
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Old 07-28-2016, 09:02 PM   #47
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Originally Posted by PoconoFun View Post
Yes please. Thanks so much!
Couldn't seem to attach it via PM so will attach it here.

Went back and searched the original thread and found it to be here on Forest river forums under...

Forest River Forums > Forest River Tech Talk > General Tech and Repair > Plumbing and Water Systems & Fixtures
Holding tank Indicator wiring
Attached Files
File Type: pdf M21 WD.pdf (70.0 KB, 17 views)
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