Battery disconnect switch
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
Battery disconnect switch
My friends truck has a draw somewhere that we cannot track down. He would like to put a remote disconnect switch on it. How many continuous amp rating are required for our diesels? I am looking at a 250 amp and a 500 amp.
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
Most batteries that I know of re rated higher thn 500 and ll of the switches that I found are 500 or less. I wonder how they rate them. They say they cn be used for gas diesel or even home (I'm guessing for. Solar battery)
Fleet Owner
Joined: Jun 2004
Posts: 25,090
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From: Rio Rico, AZ.
Pull fuses, relays, etc?
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
His vaccum pump runs off nd on when the key is off. I pulled a 30 or 40 am maxi fuse under the hood and the pump quit running. His remote start and alarm were also on that circuit so I unplugged it thinking it could be the culprit, but he said it still does it. He let's it sit for weeks at a time sometimes so thought the battery switch would be good for him.
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
Yeah tried that but no luck
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Cargo Master
Joined: Mar 2006
Posts: 2,502
Likes: 2
From: Bend Oregon
I have seen a few bad starters/starter solenoids cause a battery draw problem, Might be a place to look.
As for the battery disconnect, try finding the specs for a 7.3 ambulance battery disconnect, it should be somewhere on the net.....
As for the battery disconnect, try finding the specs for a 7.3 ambulance battery disconnect, it should be somewhere on the net.....
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New User
Joined: Apr 2009
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I just installed this one last week. 2000 amp current rating.
Blue Sea 9004e200 Battery Switch ON/OFF with AFD: 9004e200_Blue_Sea Genuinedealz
They also have good prices on wire, and lugs. I redid all my primary wiring, new battery terminals, and the disconnect for 150 dollars. That Inc users $20 for the crimper.
Blue Sea 9004e200 Battery Switch ON/OFF with AFD: 9004e200_Blue_Sea Genuinedealz
They also have good prices on wire, and lugs. I redid all my primary wiring, new battery terminals, and the disconnect for 150 dollars. That Inc users $20 for the crimper.
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
What I m looking at is a remote disconnect like a "battery brain" from summit racing or even something. Little less "fancy" from ebay. Bsically push a Button or switch in the cab that goes to a relay under the hood that disconnects it. So I don't hve to run hevy guge in the cab
New User
Joined: Apr 2009
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I prefer the solid switch, but you could use something like
Cableform, Inc. - Mining & Tunneling Products - DC Contactors, Electromechanical
That actually may even be a bit small. Figure you have two 1200 cc amp batteries. In theory on a dead short you could see 2400 amps. In reality you. Will never see that many amps, but you also are not designing in a safety factor.
Be aware that big contactors are decent size draws. If you have a weak battery or charging system they can drop offline. That's bad as it cuts main power.
I build electric vehicles as a hobby. I'm forced to use contactors some times. I have had them drop out at inopportune times because voltage sagged momentarily. I'm not sure it's something I would want on a daily driver.
Cableform, Inc. - Mining & Tunneling Products - DC Contactors, Electromechanical
That actually may even be a bit small. Figure you have two 1200 cc amp batteries. In theory on a dead short you could see 2400 amps. In reality you. Will never see that many amps, but you also are not designing in a safety factor.
Be aware that big contactors are decent size draws. If you have a weak battery or charging system they can drop offline. That's bad as it cuts main power.
I build electric vehicles as a hobby. I'm forced to use contactors some times. I have had them drop out at inopportune times because voltage sagged momentarily. I'm not sure it's something I would want on a daily driver.
Senior User
Joined: Apr 2009
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I run a 200 amp continuous relay with a toggle switch into the cab. The trick is to cut the power after the starter. Thats where you get all your power draw. You should never see more then 200 amps running all your other stuff in your truck unless you have a large amp in the truck. That way i can turn the power on and off from in the cab.