Skip the auto shop - Our mechanics make house calls

Q: alternator problem

asked by on

the alternator went up and every time we put in a new one it keeps frying, we bought the car used & it had a truck battery in it. I think the guy selling the car put the larger battery in so the car would run when we took it for a test drive. It's at car repair shop right now but the mechanic can't figure out why the new alternator is frying??? Any advice???

A: If you keep burning up alternators then you...

If you keep burning up alternators then you will need to check to see if the 175A main alternator fuse is blown. If the fuse is blown then you have a short on the large main cable that goes from the alternator to this main fuse. Depending on the engine you have the short may be at or near the alternator and may be an intermittent short. Have the wire harness checked inch by inch for the engine harness. The outer covering of the harness and wiring may have been exposed causing the short of the alternator and burning it up.

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

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: I just put in a new ECM in my 1999 Dodge avenger now it rough idels and shifts hard or lags

It is very likely that an ECM reflash will be necessary to resolve this issue. When the ECM gets replaced, the vehicle essentially loses all of its memory. The reflash will program the ECM to your vehicle allowing it to...

Q: Does a replaced water pump last a car's life time?

A water pump will last a long time but never the lifetime of the car. If the cooling system is not well maintained the debris in the system will wear the water pump seal faster than normal. The replacement water...

Q: I am having issues with the defroster blowing cold air on the driver side

Hi there. There is a blend door issue on your ducting to your heating and air conditioning system. Check all of the blend doors and make sure that they are working. The blend door that is not working properly can...

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 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...
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...