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Viair or similar 30 amp air compressor off the seven pin plug in the bed
I struck out using the search feature so here goes.
Has anyone attempted to (or does run) an air compressor like a Viair 300p or similar 30 amp air compressor off the seven pin connector located in your super duty bed? I was about to order up the adapter that I have shown below and just have at it. I'm glad I did a little bit of research. When I do a Google query it comes back with a no-go, not recommended.
10awg wire on the charge circuit. 20 amp sustained, 30 peak. Viar is 28amp sustained draw. Don't do it. Personally I would pop an Anderson SB style connector up front like a tow truck with a proper fuse or circuit breaker off the AUX taps on the distribution block by the battery and use a longer hose. Voltage drop will be an issue on longer runs.
I have the 7pin adapter as it was included in my Viair 450P-RV kit, but I don't use it due to the same concerns. I'll just use an airline extension if I need more length and connect the compressor directly to the truck battery, and run the engine while using it. Works great every time.
If you decide to hook it to the battery and need some custom cables to do the job nicely, I recommend Battery Cables USA for your custom cable needs: BatteryCablesUSA.com
I recently purchased a fishing boat and wanted to redo/add some batteries and circuits and this outfit provided superior service. Top quality cables made exactly as ordered and extremely fast service.
FWIW, I also recommend hooking direct to the battery with proper size cables rather than using the 7-pin plug.
As others have said, it's a no-go unless you want to potentially light your truck on fire due to melted wiring. Those wires are NOT rated for the constant load you're looking to put on them. Some electricians would argue that the wiring in the truck is too light for what Ford rates the circuit at.
If you HAVE to have the compressor in the bed of the truck, run custom/dedicated wiring back there, or as someone mentioned use an Anderson-style connection direct to the battery.
Last edited by 99powerstrokedF250; Today at 08:10 AM.
Not to mention, those portable tire inflators are really only good for small car tires.
Yeah I agree that's been my experience in the past with some of the Walmart tire inflators etc. But I gotta say, that is NOT my opinion with the Viair 450P. It is built much better and handles pumping up much more than small car tires way, way better when used properly. Don't get me wrong, it's not anything like having an actual gas powered oil-lubricated IR compressor with a 30 gallon tank at your disposal, but it is definitely a long way off from those cheapie plastic cased tire inflators I had in the past. I've pumped up truck tires and RV tires with the Viair many times when on the road, and it still runs like new. It ain't cheap though.
Yeah I agree that's been my experience in the past with some of the Walmart tire inflators etc. But I gotta say, that is NOT my opinion with the Viair 450P. It is built much better and handles pumping up much more than small car tires way, way better when used properly. Don't get me wrong, it's not anything like having an actual gas powered oil-lubricated IR compressor with a 30 gallon tank at your disposal, but it is definitely a long way off from those cheapie plastic cased tire inflators I had in the past. I've pumped up truck tires and RV tires with the Viair many times when on the road, and it still runs like new. It ain't cheap though.
Yeah this is definitely not one of those 'cheap' tire inflators that take forever to hit 35 psi. This is a much more robust unit.
Yeah I agree that's been my experience in the past with some of the Walmart tire inflators etc. But I gotta say, that is NOT my opinion with the Viair 450P. It is built much better and handles pumping up much more than small car tires way, way better when used properly. Don't get me wrong, it's not anything like having an actual gas powered oil-lubricated IR compressor with a 30 gallon tank at your disposal, but it is definitely a long way off from those cheapie plastic cased tire inflators I had in the past. I've pumped up truck tires and RV tires with the Viair many times when on the road, and it still runs like new. It ain't cheap though.
I'll look into them more. My experience was using one in a parking lot to fix my flat and 30 minutes later it's still going, allowing for cool down cycles for the inflator. Usually I take a small compressor filled before I go camping, it's saved me twice, I've been able to use a 110 outlet at the places I stopped to inflate the tire fully after it's plugged.
Also keep in mind that the power to the trailer is activated by the trailer module itself, and no power it provided until a trailer is actually connected. That plug "may" have something in it to trick the module, but as others said, good way to melt the truck as the battery circuit isn't really meant to do anything but keep the battery topped off, it don't do jack for charging.
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