Skip the auto shop - Our mechanics make house calls

Q: When to disconnect the battery during repair

asked by on

What kind of work requires the battery to be disconnected? Does replacing fuses require it?

No replacing fuses isn’t required. If you want to do any kind of serious electric work, it could be required because you don’t want to short out the power to your wiring system and have it go back to the computer and fry the computer. Say you’re going to change the alternator, first take one of the battery terminals off. Then you can’t short anything up. Say you’re working under the dash - I’ve seen more guys replacing the radio on their cars and then short something out and ruin the computer of the car. Anytime that you mess with electricity, it’s good to unplug a terminal and then do your work. But you don’t have to do it for just a fuse. The fuses are safety devices themselves anyway. If you want to have a fuse replacement done for you, a certified technician from YourMechanic can come to your location to perform the task.

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!
  1. Home
  2. Questions
  3. When to disconnect the battery during repair

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: Cat below bank threshold bank2

Hi, thanks for writing in. If you are experiencing a code related to catalytic converter failure I would recommend having your catalytic converter inspected by a local exhaust professional. Once you have determined if your catalytic converter is failing, I...

Q: Fuse keeps blowing

Fuses are a safety device that are supposed to be the weakest link in the electrical system. They are designed to pop open when the amperage exceeds its rating. I would suspect that the positive wire feeding the pump or...

Q: Dead battery

This depends on the engine you have in your Ford F250. As you may know, this truck had an option available with a diesel engine which generally would require much more cranking power than the 5.3L motor that would have...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.