Running 12v Pump Off Truck Batt

RGilliam said:
I'm wanting to hook a delevan up to my truck batterys. I know theres a few people on here that have done it. What gauge wire did you use? I read somewhere not to use alot of wire when hooking them up? Any help would be appreciated!

Thanks,
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Run only the positive wire to the battery terminal. Run the negative to the closest point with solid metal, preferably with existing bolt by the pump.
You should try to keep the positive as short as possible as well. Connect the inline fuse not more than a foot from the battery terminal. Put heavy duty switch (30amps +) on the line as well close to the pump. Wire should be 10 gauge and the fuse should be 30amps. Make sure all connections are tight, solid, dry and out of chemical reach.

D.
 
There is a way to do it through your trailer connection. I believe I read where that had been done.
 
Scott with Confident Roof & Exterior has his 12 pumps wired into his trailer connector. He would be a good one to ask about it.
 
I would use a heavier gauge wire if the positive run is going a long distance. Plus for added protection I like to solder all connections, coat them with Dielectrical grease, and heat shrink rubber tubing. I like added protection for anything that could get water and chemicals splashed on it. I love overkill
 
I agree soldered connections are best. At minimum go with a 10 gauge to the pump, I would go even larger if it is a longer run. I would also put in an additonal on/off switch so you don't have an issue with possible batttery discharge.
 
Running the wire a long distance is a no, no. Ask me how I know! Run it from your battery-Yes but run it to another external battery which is set up close to your pump to keep the amps down. My truck battery keeps the external one juiced up. I've NEVER had to re-charge my battery (The one that the pump runs off) I also have a 30amp fuse link at the battery in my truck and one right before the 12volt pump for protection.
 
Great point. I agree with a second battery, because this way you can ALWAYS start your truck if everything else shuts down. No one likes to be broken down with a truck, trailer, and employees you are now paying to sit there. LOl
 
Fat boy or 5850? Does your trailer have brakes? How big is the trailer? Pumps at front or back of trailer?
 
Larry Millette said:
Running the wire a long distance is a no, no. Ask me how I know! Run it from your battery-Yes but run it to another external battery which is set up close to your pump to keep the amps down. My truck battery keeps the external one juiced up. I've NEVER had to re-charge my battery (The one that the pump runs off) I also have a 30amp fuse link at the battery in my truck and one right before the 12volt pump for protection.
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Larry, what size wire do you run from your truck battery to your pump battery? How long would you say it is? Do you use an isolator?
 
Johnson said:
Larry, what size wire do you run from your truck battery to your pump battery? How long would you say it is? Do you use an isolator?
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I believe its 10gauge and only runs from my truck battery to a welders connector(male end) at my hitch. Aprox 10-12ft. The female end runs aprox 3ft to a marine battery to keep it charged. Seperate wires go to my 12volt pump (2.5-3ft away). Anytime my truck is running my marine battery is charging up.
Welding-Cable-Connector-DKL-Series-.jpg
 
You can't run the Fatboy directly from the truck battery. The power fluctuates too much and too often and it blows relays left and right.

If your trailer doesn't have brakes but you have a 7 pin harness, then find which wires are unused on the harness. Mount the battery in the trailerr as close to the pump as possible. Connect the battery with no smaller than 10g wire directly into your harness (the unused wires) and make sure you put in a 30a fuse in line. Now when your trailer is hooked to the truck it will charge the battery and if you get low on a job, you can start the truck for some added juice.
 
Oops sorry, I ignored that you said it was in a box truck. Lol. You'll need to run the wire from the truck battery to a dedicated battery in the box, then run that from the battery to the pump. Make sure theres an in line fuse between the pump and battery.
 
so run a wire from one battery to the other battery thats dedicated for the pump? The truck has 3 batterys. They have one wire ran from one battery to the other. Isnt that pretty much the same thing if I just hooked the pump up to one of those batteries? Im not running a little old battery. Not sure how many CCA it is but they're huge, and they're 3 of them.
 
RGilliam said:
so run a wire from one battery to the other battery thats dedicated for the pump? The truck has 3 batterys. They have one wire ran from one battery to the other. Isnt that pretty much the same thing if I just hooked the pump up to one of those batteries? Im not running a little old battery. Not sure how many CCA it is but they're huge, and they're 3 of them.
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The problem is that pulling from that far tends to draw too many amps and will not only heat up the wire but it will blow fuses and possibly even fry your pump. You want the battery to be as close to the pump as possible to reduce the amps being pulled. It doesnt matter if you hae 30 batteries under your hood. Its still too far to pull from.
 
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