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Old 12-04-2021, 11:29 AM   #1
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Join Date: Dec 2021
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Battery disconnect relay location

I just bought a 96 Dolphin 434. Been redoing the interior while parked next to the house. All of a sudden one day the switch does not work to turn on the batteries the one next to the entrance. No noise from the switch and doesn't light up.

So either it's the switch or the relay? I cannot find where the relay is, from what I have read it's supposed to look like a Ford starter relay? I looked in the front of the engine compartment and I don't see anything like that

If anyone can point me where the relay is I sure would appreciate it
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Old 12-04-2021, 11:33 AM   #2
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Join Date: May 2007
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is the house battery charged
2007 Sea Breeze LX 8321 Ford Chassis
2004 Ford Ranger Edge
El Cajon CA.
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Old 12-04-2021, 02:21 PM   #3
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As said first check the batteries have a charge.

The 12v controller board should be in one of the basement compartments near the batteries. My 2001 dolphin is in the compartment in front of the door and the batteries are under the steps. The relays are on the back of that board or near it. The second comment in this thread has a diagram that should be similar to yours (not identical) to give you and idea.

I have some detailed documentation on the electrical (for a 2001) but I would have to look for it. If you need it let me know.

Found the trouble shooting guide. See attached pdf
Attached Files
File Type: pdf National 12V Distribution Center TSG.pdf (469.5 KB, 11 views)
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Old 12-04-2021, 02:56 PM   #4
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If yours is like mine there is a compartment just ahead of the entry door that contains the converter and a fuse panel with the battery boost relay and disconnect relay attached to the back of the fuse panel. I had the same issue as you have and found the switch in the panel near the door was bad. I replaced all the switches in that panel along with the LED that indicates the disconnect relay is on. Keep in mind that the relay is a special type that latches on when activated . If yours is in a different location I would think that the fuse panel would look similar to mine.Click image for larger version

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Old 12-04-2021, 03:48 PM   #5
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As others have stated, it will be in a compartment close to the house batteries. On our Winnebago, it is located ahead of the steps, house battery location. Closest location between chassis and house batteries, house battery disconnect and connections to chassis for charging and boost systems. It's located in a compartment ln the back wall of a storage compartment.

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Old 12-05-2021, 05:17 PM   #6
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Thanks all gives me some ideas will dig into this soon I hope
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Old 12-06-2021, 12:22 AM   #7
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Did you download the documentation at the link I posted in your other thread? RV Custom Products is the manufacturer of the BCC and the link is direct to their website. You can call RV Custom Products if you still need help.
1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000,1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
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Old 12-15-2021, 03:34 PM   #8
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On my 1988 Dolphin, there is a hidden compartment in the bay next to the entry door towards the front of vehicle. Remove the back panel of the bay and tyhe relays are back there.
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battery, battery disconnect, cat, disconnect

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