Trailer Fuse Blows When Two Series-Wired 6V Batteries are Connected
Had 2 12 volt batteries and I changed to two 6 volt batteries. I have them wire in in sequence but I keep blowing my 15 amp fuse inside the trailer
asked by: Colby
Helpful Expert Reply:
A single 12V battery can be replaced with two 6V batteries that are wired in series. This wiring arrangement is shown in the linked image. Two 12V batteries in series produce 24 volts; two 6V batteries in series produce 12 volts.
If the batteries are wired in series, the positive terminal of one battery will be connected to the negative terminal of the other. This would double the output of the batteries, so two 6V batteries wired in series would provide 12 volts of output. Current capacity does not increase.
The fuse in your trailer power box blowing could be a result of a short in the wiring or from the trailer's various electrical items drawing too much power for the amperage (current) rating of the batteries. They will have the correct voltage (12V) when series-connected but the batteries may not have the CURRENT capacity for all appliances and devices inside the trailer. Check the total current drawn by the trailer and compare this to the current amp-hour rating of the two 6V batteries.
Your answer has been submitted!
Featured Help Information
Similar Expert Q&A Pages
- Troubleshooting An E3 Error Code With A Furrion RV Air Conditioner System
- How To Troubleshoot Electric Trailer Brake Magnets
- Trailer Brakes Not Strong Enough To Stop Trailer
- Manual Override Will Not Work Twice in a Row with an EOH Actuator
- Multimeter Recommendation for Testing Voltage Drop of Brake Controller Install
- Using Circuit Tester to Test Trailer Wiring to Find Problem
- How to Bench Test Electric Trailer Brake Assemblies and Magnets
- Troubleshooting Uneven Braking on Sides of Trailer That Switches Sides with New Brake Assemblies
- Troubleshooting Trailer Brake Controller No Longer Showing Power to Brakes After Short On 7-Way
- Camper Brakes Only Applying with Manual Override on Brake Controller
- How to Verify 12V Pin on 7-Way Connector is Active
- Do I Need an AC or DC Replacement Ceiling Fan Needed For RV?
- Troubleshooting Trailer Brakes Getting Only 8 Volts Of Power
- Troubleshooting A Furrion DV3100 RV Stereo That Wont Turn On
- Troubleshooting P3 Brake Controller that Has Short Error Code at 5 mph
- Troubleshooting Only One Trailer Light Working
- MaxxAir Fan Troubleshooting
- Troubleshooting tail lights on 2005 Infinity G35 Coupe
- Troubleshooting Power Issues With A Way Interglobal 12V RV Ceiling Fan With Wall Switch
- Should Electric Trailer Brakes Have Continuity Between The Two Wires?
- Troubleshooting P3 Brake Controller that Applies Light Braking All the Time
- Troubleshooting Electric Trailer Brake Wiring Voltage Issues
- Trailer Brakes Seem Weak After Installing Prodigy Brake Controller on 2001 Ford Excursion
- Testing Brake Magnets on Trailer
- What is the Maximum Amperage Draw Rating for a 7-Way Trailer Connector
- Testing To See If Brake Magnets Are Bad
- Equipment for Testing Trailer Wiring and Brake Magnets
- Should The Trailer Brake Circuit Have Continuity Between the Blue Power Wire and Ground?