Skip the auto shop - Our mechanics make house calls

Q: 25 amp fuse blows after it's charged

asked by on

The 25 amp fuse sitting on the positive lead that comes out from the rectifier, instantly blows after it is changed. This causes the battery not to charge when the motor is running. For the fuse to blow, the engine doesn’t have to be running. I decided that there is probably something wrong between the fuse and the battery. At one time, I found that the battery had been connected with the positive pole to grounding and the negative pole was where the positive should have been. After that, the main fuse blew and it was replaced. I’ve tried replacing the battery, but that didn’t help. What should I do to fix this and do you have a wiring diagram or know where I can get one?

A: When the battery was hooked up incorrectly,...

When the battery was hooked up incorrectly, something must have been fried in the computer or other wires. You can find wiring diagrams in service manuals that are dedicated to your specific vehicle such as Chilton, Haynes, or factory specific manuals. You may also be able to find wiring diagrams on the internet but be careful with those as they may be incorrect.

I would recommend having this issue diagnosed by a professional who is proficient in electronics diagnosis. This will save a tremendous amount of time when getting down to the bottom of this issue. Taking this route should not even cost too much extra than fixing it yourself as it will likely take the mechanic an hour or two to find out what is wrong, whereas you could spend a day or two figuring out the same issue. Once the cause of the issue has been found, the mechanic can then replace parts as necessary to resolve the issues you are having.

If you feel like you need assistance with this, get some help from a professional mechanic who can diagnose your electrical issue firsthand. Once this is done, the appropriate repairs can be made to get your car running normally again.

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: Can the idle air control cause my engine to idle roughly?

Hi, thanks for writing in. Sure, the idle control valve can definitely cause the rough idle. Typically this will be caused by excess carbon buildup inside the throttle body or fuel injector nozzles themselves. Your 2006 Kia has multiple sensors...

Q: Interior lights will not shut off

There are two possibilities that can cause the problem you describe. One of the door ajar switches first may not work when you open the door, making contact and signaling the body control module to turn on the interior lights....

Q: coolant leaking from under car

Hello. A coolant leak can come from a number of places under the hood. Typically, if it just started smoking all of a sudden, it is because a hose failed or the water pump is leaking. I typically get...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...