Skip the auto shop - Our mechanics make house calls

Q: I have an RV with 2 batteries 12V sequenced together.

asked by on

The batteries are sequenced together with one being auxiliary power when a button is pressed from the driver's seat. Can I have a battery charger on one battery and jumper cables connected to the other while I start the RV?

A: Hi, thanks for writing in. You would not re...

Hi, thanks for writing in. You would not recommend trying to jump start the car using a battery charger unless the charger has a boost function. A battery charger should be used to charge the batteries first and then disconnect it while you crank the RV.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine turns, but won't start

The 5.4L Triton V8's are notorious for the ignition coils failing. There is a TSB out concerning these coils. The engine uses a coil over plug setup and while you can read out faults to see which coils have cylinders...

Q: we replaced the batteries and got all new heavy duty cable wires, truck will not start just makes a click sound.

Hey there. This is a common issue on many vehicles when the starter relay is bad. This is a small unit on the starter that directs power from the battery to the starter causing it to engage the flywheel as...

Q: Battery jump reverse connectors

Hey there, thanks for writing in about your 2013 Kia Fote Koup. Fuses are in place to protect wiring and components from failure. By connecting the cables in reverse direction you created a surge in amperage, and the flow of...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.