How does one charge a dual battery vehicle?

Hooking up one will take care of both. If you truly want to charge each separately you'd have to disconnect the correct wire. Of course, I'm assuming that.

If you wish to be totally picky, connect the positive clamp on one battery and the negative clamp on the other battery.

pianotuna wrote:
If you wish to be totally picky, connect the positive clamp on one battery and the negative clamp on the other battery.

The second cable connected(the negative) should be connected to a bolt on the engine away from the battery(ies) that might be gassing, and cause a battery explosion. Also that is the first cable you disconnect. Chris

Is this covered in your Ford Owner’s manual?

18F in Four Corners overnight. Get those batts charged up!

I've always connected my charger to the positive on one battery and the negative to a chassis ground. Been doing it for years with no issues.

Since everyone has beat that answer to death. I'll throw this one out:

Start the engine and let the alternator(s) do its job. Not only will this charge the batteries, but it will circulate the fluids as well.

harmanrk wrote:
Start the engine and let the alternator(s) do its job. .

I don't remember ever having to charge my truck's batteries. I didn't have any phantom loads that would draw it down.

RKW wrote:
What is the proper method of charging the batteries in a vehicle with dual batteries? Specifically my 2015 Ford SuperDuty Diesel.

My question ,why are you having to charge them ?? Reason I ask is its a 2015 ,and I suspect you are due for new batteries. Just went thru this. I jumped it twice , drove it ,and it started okay the next day, the day after no go. That was enough of that , new batteries .

The biggest signs on the Ram trucks, and my son experienced it too, was crazy stuff happening electronically , radio not working etc. There is no slow cranking with these Rams, telling you the batteries are getting bad, its just one day it won't start. Just a click.

As far as charging I would disconnect them ,and charge separately.

cummins2014 wrote:

RKW wrote:
What is the proper method of charging the batteries in a vehicle with dual batteries? Specifically my 2015 Ford SuperDuty Diesel.

My question ,why are you having to charge them ?? Reason I ask is its a 2015 ,and I suspect you are due for new batteries. Just went thru this. I jumped it twice , drove it ,and it started okay the next day, the day after no go. That was enough of that , new batteries .

The biggest signs on the Ram trucks, and my son experienced it too, was crazy stuff happening electronically , radio not working etc. There is no slow cranking with these Rams, telling you the batteries are getting bad, its just one day it won't start. Just a click.

As far as charging I would disconnect them ,and charge separately.

My 2015 with 60K on the clock got batteries in Sept. If the voltage drops to much the "electronics" terminate the start sequence.