Battery Disconnect for 2007 Ford F-250 with Dual Batteries
Published 03/23/2026
Question:
I have a 2007 Ford F250 that I use for towing our RV 1-2 times per year. Is there a battery disconnect that would work for this dual battery vehicle? I found that if i disconnect one battery, the other appears to keep running the accessories and draining the battery.
asked by: Carlos I
Expert Reply:
Hey Carlos, since your 2007 Ford F-250 that has two batteries is most likely a diesel engine you'd want to run two battery disconnect switches like the Roadmaster part # RM93MR which was designed for diesel engines like what you have that draw a lot more amperage to start the vehicle. How often do you flat tow the vehicle?
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Product Page this Question was Asked From
Roadmaster Battery Disconnect for Towed Vehicle w/ Flat Tow Brake System - Diesel
- Accessories and Parts
- Flat Tow Wiring Harness
- Battery Disconnect
- Roadmaster
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Carlos I.
3/23/2026
Yes it is a 6.0 diesel. Once or twice a year we tow a 34’ fifth wheel. I gather that there is not a single switch that could be wired to handle the 2 batteries simultaneously.