User Tag List

Results 1 to 8 of 8
  1. #1
    Long Hauler huntindog's Avatar
    Join Date
    Nov 2017
    Posts
    2,175
    Mentioned
    33 Post(s)
    Tagged
    0 Thread(s)

    Adding a tank to the one control tank monitoring

    Has anyone ever done this?
    I just added a 52 gallon grey tank servicing the Kitchen sink and W/D hookup. The way it came from the factory had the 1/2 bath, bath sink, toilet, Kitchen sink, and W/D all going into one tank. That tank now only services the 1/2 bath.

    The added tank is an exact match from GD to the others, and it has the sensors installed. The one control shows a tank with no readout. So I am wondering if the wiring may be already installed somewhere? If so, where would it be?

    TIA
    2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
    Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
    800AH BattleBorn Batteries No campgrounds 100% boondocking
    2020 Silverado High Country 3500 dually crewcab Duramax Allison

  2. #2
    Paid my dues 😁 FT4NOW's Avatar
    Join Date
    Sep 2016
    Posts
    4,570
    Mentioned
    136 Post(s)
    Tagged
    0 Thread(s)
    Wires should be behind the false wall in the basement. You should see a tank monitor module with wires coming out of it and hopefully there are extras or at least extra terminals for the new tank.

    Sent from my SM-G950U using Tapatalk
    2023 Momentum 398M-R
    2023 Ford F-450

    SOLD - 2021 Reflection 311BHS
    SOLD - 2017 Momentum 399TH

  3. #3
    Long Hauler offtohavasu's Avatar
    Join Date
    Dec 2014
    Location
    Fountain Valley, CA
    Posts
    2,254
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Being a 2021, you'll have the new control module with everything built on the board, with the exception of the Schwintek controller.

    It will look like this:

    Click image for larger version. 

Name:	image_5782.jpg 
Views:	122 
Size:	99.6 KB 
ID:	31637

    Click image for larger version. 

Name:	image_5785.jpg 
Views:	118 
Size:	35.3 KB 
ID:	31638

    Click image for larger version. 

Name:	image_5786.jpg 
Views:	116 
Size:	59.4 KB 
ID:	31640
    Attached Thumbnails Attached Thumbnails image_5786.jpg  
    Last edited by offtohavasu; 01-18-2021 at 10:10 AM.
    Curtis, Christine, Cole, and Charlotte

    2007 Chevrolet Silverado Duramax LBZ, CCLB
    2020 Momentum 351M

  4. #4
    Long Hauler huntindog's Avatar
    Join Date
    Nov 2017
    Posts
    2,175
    Mentioned
    33 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by offtohavasu View Post
    Being a 2021, you'll have the new control module with everything built on the board, with the exception of the Schwintek controller.

    It will look like this:

    Click image for larger version. 

Name:	image_5782.jpg 
Views:	122 
Size:	99.6 KB 
ID:	31637

    Click image for larger version. 

Name:	image_5785.jpg 
Views:	118 
Size:	35.3 KB 
ID:	31638

    Click image for larger version. 

Name:	image_5786.jpg 
Views:	116 
Size:	59.4 KB 
ID:	31640
    I have been looking at that. Mine is buried worse than yours. The 5 wire ribbon that goes to all of the tanks goes across the front of it and wraps around the rear. I cannot figure out just where the tank wires attach. I noticed that on the wires I can see leading from the coach to the one control board, that they pigtail onto a different colored wire that then plugs into the board,. This may be what is happening to to the tank wires, behind the board. Or maybe they plug in on the backside. It appears to be pretty involved to disassemble any of this for a better look.
    I am considering just mounting a conventional monitor panel just for this new tank.
    2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
    Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
    800AH BattleBorn Batteries No campgrounds 100% boondocking
    2020 Silverado High Country 3500 dually crewcab Duramax Allison

  5. #5
    Long Hauler offtohavasu's Avatar
    Join Date
    Dec 2014
    Location
    Fountain Valley, CA
    Posts
    2,254
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    I've noticed on mine that on pigtails that come off the connector that are not in use are just there. They don't terminate or anything.

    My original use for this diagram was to figure out how to wire the outside temperature sensor to get the outdoor temp to show up on the control panel.
    Curtis, Christine, Cole, and Charlotte

    2007 Chevrolet Silverado Duramax LBZ, CCLB
    2020 Momentum 351M

  6. #6
    Long Hauler huntindog's Avatar
    Join Date
    Nov 2017
    Posts
    2,175
    Mentioned
    33 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by offtohavasu View Post
    I've noticed on mine that on pigtails that come off the connector that are not in use are just there. They don't terminate or anything.

    My original use for this diagram was to figure out how to wire the outside temperature sensor to get the outdoor temp to show up on the control panel.
    I got it figured out. There were 6 wires not being used. One had no power. 2 had 12 volts, and 3 had about 9 volts, the same as the othe tank wires. On a hunch, I decided to determine what color wire serviced the grey tank It was grey. I then looked at what colored wires had 9 volts. One was grey with a black stripe..... That was it, grey tank # 2 is now operational!
    Thank you Curtis for your help. It gave me just enough info to figure out the rest.
    Last edited by huntindog; 01-30-2021 at 06:20 PM.
    2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
    Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
    800AH BattleBorn Batteries No campgrounds 100% boondocking
    2020 Silverado High Country 3500 dually crewcab Duramax Allison

  7. #7
    Long Hauler huntindog's Avatar
    Join Date
    Nov 2017
    Posts
    2,175
    Mentioned
    33 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by huntindog View Post
    I got it figured out. There were 6 wires not being used. One had no power. 2 had 12 volts, and 3 had about 9 volts, the same as the othe tank wires. On a hunch, I decided to determine what color wire serviced the grey tank It was grey. I then looked at what colored wires had 9 volts. One was grey with a black stripe..... That was it, grey tank # 2 is now operational!
    Thank you Curtis for your help. It gave me just enough info to figure out the rest.
    Correction: It was a grey wire with a white stripe.
    2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
    Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
    800AH BattleBorn Batteries No campgrounds 100% boondocking
    2020 Silverado High Country 3500 dually crewcab Duramax Allison

  8. #8
    Long Hauler offtohavasu's Avatar
    Join Date
    Dec 2014
    Location
    Fountain Valley, CA
    Posts
    2,254
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Glad you got it figured out. Sorry I haven't been out to the trailer yet to get pictures.
    Curtis, Christine, Cole, and Charlotte

    2007 Chevrolet Silverado Duramax LBZ, CCLB
    2020 Momentum 351M

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

DISCLAIMER:This website is not affiliated with or endorsed by Grand Design RV, LLC or any of its affiliates. This is an independent site.