Can I Use a 7-Way to 12 Volt Power Adapter to Run a Cooler Off of an In Bed 7-Way While Towing?
Updated 02/17/2026 | Published 02/10/2026
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Question:
Have a 21 F350, can I use the adaptor on the 7 pin inside the bed to run a cooler while a travel trailer is hooked up to the 7 pin on the bumper?
asked by: Joe D
Expert Reply:
Hey Joe, welcome back! How much power draw does your cooler have? The circuits that power your 7-ways are often fused with a 30 amp fuse/relay. The factory and aftermarket options like item # C57010 are ran off of the same circuit. You'll want to make sure you don't overload that circuit and blow the fuse when using the Pollak 7-Way to 12 Volt Power Outlet Adapter item # PK11896.
Another option would be to install the Furrion 12 Volt Socket with Waterproof Cap item # FR36XD in the bed of your truck. You can use a few feet of the 10 Gauge Wire item # 10-1-1 and a 20 Amp Circuit Breaker item # PK54220 to connect directly to your battery.
What kind of cooler do you have?
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Jim O.
2/15/2026
I can’t speak to your F350 but my ‘19 Silverado 3500HD has a 40 amp fuse on the aux battery. Depending on what you’re running in the trailer at the same time, it shouldn’t be a problem. I bought my 7way/12v connector to run a portable air compressor from the rear bumper.
Tom
2/15/2026
I use the adapter in several ways. Relative to your question Joe I use the adapter to charge a power station while driving which is powering a 12 volt cooler. The power station is to keep the cooler going when making long stops so not to drain the truck battery. The power station has pass through charging of course.
Cheryl Z.
2/16/2026
It works great!! No problem using it for a cooler.
Product Page this Question was Asked From
Pollak 7-Way to 12 Volt Power Outlet Adapter
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 7 Blade
- Plug Only
- Pollak
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Joe D.
2/14/2026
Thanks Jarred, the cooler is an Iceco JP50pro. 50watt