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?

A: No replacing fuses isn’t required. If you w...

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?
Recommended services
Get a Quote

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

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: Car loses power and stalls - 2014 Cadillac ATS

Hi! You may have to leave your vehicle with the dealership in order for them to be able to duplicate the concern. While it is not necessary for there to be diagnostic trouble codes present in the vehicle's computer in...

Q: Fuse keeps popping in car

After looking at the wiring diagrams for your car, I cannot find any 30 amp fuses in the fuse box location you describe. I see all different sizes up to an 80 amp. Most big ones are 40 or 50...

Q: Key stuck in ignition

Hello! There are three things that are likely causing your issue: a faulty interlock control unit, a stuck gear shift lock, or a faulty ignition cylinder. At times, a little WD-40 on the key and key hole, or wiggling the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...