Q: Dim dashboard lights..slower electrical functions

asked by on

I just recently purchased a battery from Lea Schwab..they claim to have run all diagnostic test for battery and alternator ..now my check start system alarm is illuminating constantly and I'm losing power to certain electrical functions (power windows..windshield wipers..heater) .they are functioning but at slower speeds than normal..i brought my car back to Les Schwab and they said they ran all diagnostic test and concluded that there is a glitch in my electrical system..i know this is not the case..is it possible that my alternator my be going out dispite what Les Schwab is telling me?

Hi there. In order to give you the best information I would need to know what kind of vehicle this is. From what you are explaining though it does sound like there is an issue with the electrical system. These problems can occur if the battery that was installed in the vehicle is too small or if the alternator is not charging properly. Most of the time though it is caused by high resistance in the positive battery cable or loose or dirty connections on the negative battery cable. Both of these will cause this. I usually check these connections and cables first an then load test the battery and the alternator. It can also be an ignition switch, but that is not as common. If you want to have this electrical problem looked at, consider YourMechanic, as a certified mechanic can come to you to [diagnose the problem within the electrical system] https://www.yourmechanic.com/services/electric-problems-inspection

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. Dim dashboard lights..slower electrical functions

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: Sudden loss in power

Jumpstarting a car made in this century is always a risky business. Even if you do everything right, the resulting power surge can damage the cars electronics. If you hook the cables up backwards, there is a spark and the...

Q: I recently got a new battery and starter with in a month for my 2006 bmw 330i. Now the car won't start and key buttons won't work.

Hello, thank you for writing in. To remove the key from the ignition, you are going to want to disconnect the battery. The electronic sensors that register you are in park and allow the key to come out are not...

Q: Can't drive car due to alarm system

The best course to start the diagnosis is to have the aftermarket alarm removed and the vehicle put back to original factory specification to see if the aftermarket component is the cause of the failure. You may need to enlist...

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...
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...
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...