BATTERY DISCONNECTS

Battery Disconnects For Peterbilt Trucks

Battery disconnect switches are an important safety and maintenance tool on heavy-duty Peterbilt trucks. They allow drivers and technicians to fully isolate the electrical system during storage, service work, or in the event of a short circuit or fire. In fleets with extended layover times, battery disconnects also help prevent parasitic drain that can kill batteries overnight. We carry rotary key-type, lever-style, and remote-actuated disconnect switches compatible with 12V and 24V truck electrical systems.

Frequently asked questions about battery disconnects

Where is the battery disconnect switch typically located on a Peterbilt?

On most Peterbilt models, the battery disconnect is located on the driver's side frame rail near the battery box, or inside the cab. The exact location varies by model year and how the truck was spec'd at the factory — some fleets add aftermarket disconnects in more accessible locations for driver convenience.

Will disconnecting the battery cause any issues with my truck's electronics?

On newer Peterbilt trucks with electronic engine controls and aftertreatment systems, disconnecting the batteries can reset certain adaptive parameters and may require re-learning after reconnection. In most cases this is minor, but it's worth noting before disconnecting during service on trucks with PACCAR MX engines or active fault monitoring systems.

What's the difference between a manual battery disconnect and a remote-actuated one?

Manual disconnects require physical access to the switch, which is standard for maintenance use. Remote-actuated or electrically controlled disconnects can be operated from inside the cab, making them useful for drivers who need quick shutoff capability without exiting the truck — an important safety feature in certain hazmat hauling applications.

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