Q: is the ecm the problem if battery light is on and the alternator isn't bad

asked by on

battery light is on and the charging system doesn't keep battery charged, alternator replaced as well as battery and no change to problem, the wire from alternator to battery block in engine compartment burns out and any direct wire made from alternator to battery block burns up - do not know if wire was damaged before old alternator was replaced, the actual battery is in wheel well, being told the ecm is culprit, the engine light is not on only the battery light, was told the voltage regulation of system is in the ecm for this year of car

My car has 87000 miles.
My car has an automatic transmission.

This is likely a sign of a failing voltage regulator. This is a unit that regulates the charging of the battery by the alternator. In your case, it sounds like the voltage output from the alternator may be much too high resulting in overcharging the battery and burning up wires in the process. I would recommend having an expert from YourMechanic come to your location to diagnose and properly test your vehicle’s charging system.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. is the ecm the problem if battery light is on and the alternator isn't bad

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: Q: Engine turns over, doesn't start

Since this is a 1970 model, then you may have a problem with the ignition system or the carburetor not getting or giving fuel. The points in the distributor or the carburetor may be plugged. I recommend having a mechanic,...

Q: My car is losing coolant from tailpipe

Hi there. According to what you've described, it does sound like your mechanic was correct; a blown head gasket. The radiator reservoir leak may have lead to the blown head gasket by causing a low coolant level, thus resulting in...

Q: I'm planning on buying an 1987 dodge truck as a first vehicle but I'd like to know what are the first things I should replace?

Hello, thank you for writing in. 1987 truck's by Dodge were enjoyed for decades. The truck you are looking at is going to need components specific to the condition the truck is in. If you have not already, obtain a...

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...