Skip the auto shop - Our mechanics make house calls

Q: Battery keeps blowing fuse.

asked by on

I need to start. I thought the battery was dead, so I replaced it with a new one and it arched when I started it up, blowing the main fuse. I replaced the main fuse and it arched again, blowing the replacement. I had the cables hooked up correctly.

A: It sounds like there is an electrical short...

It sounds like there is an electrical short in your starting system. The power needed to start your vehicle is not traveling its intended path. This power may also be traveling to a circuit not meant to handle that much power therefore blowing the fuse. I would recommend having your starting system inspected for any wiring faults. Have the technician look at all the wires closely for any cuts, frayed ends, or missing insulation that could possibly cause this issue. Have the technician check any grounds found in the system for good connections and remove any corrosion found.

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: Oil cooler leaking due to faulty gasket.

Hi there. The oil cooler gasket, or the lines, could be the cause of the leak. Other owners have had both of these problems and the only way to verify where your leak starts is to add oil dye and...

Q: Horn stays on

Based on the information you provided, it sounds like you have a short in the horn's wiring. It may be at the steering wheel but could also be elsewhere. Electrical tests will be able to confirm the location of the...

Q: What does 'auxiliary battery malfunction' mean? Also, I hit a trailer and broke a taillight yesterday, should I go to repair shop or dealer?

Your car has two batteries. One conventional sized battery manages the heavy loads like the starter and one smaller battery manages the body loads. The smaller battery is the auxiliary battery and it must be failing. Part of the point...

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.
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.