Dual batteries

Hello, not sure I'm understanding your question. The accessories being used are affecting the starting of your Diesel powered Dodge Ram 3500? I'm guessing here, but if your batteries are becoming discharged due to accessory use, you may want to run the vehicle during the use of those accessories. Not sure what, how long and so forth, but accessory usage will run the batteries down, and that Diesel takes some power to crank over.

IF operating accessories for only a few minutes results in engine cranking problem - have BOTH batteries thoroughly tested - if either battery is found to be defective - it is highly recommended to replace *BOTH* batteries at same time with a matched pair.. One defective battery will have adverse affect on the other..