Q: Car has electrical problems and starting issues

asked by on

My car has gone 65,000 miles so far. It's been having some electrical problems lately. I tried replacing the alternator twice but it didn't help. When the car starts acting out, the dashboard lights would come on but only at the left side of it. There would be random shutoff of the radio and turn signal sound as well. The service traction control system warning would turn on unexpectedly. After all this, the car occasionally won't start and the key would be stuck in the ignition. I would manage sometimes to restart the car after it's been sitting for a while. This also differs, so I would wait for several minutes on occasion, whereas at other times it won't start for the next day or so. What might be causing this?

My guess is that the problem is with the body control module (BCM). The BCM functions as the power mode master (PMM). In this role, it receives an input from the ignition switch when the key is turned to the "On" position. The BCM then sends this information to other modules that needs this information to activate relays and other outputs. The BCM also serves as a gateway to facilitate communication between various modules. The BCM is directly involved in both instrument cluster operation and vehicle starting. I suggest you have a trained professional, such as one from YourMechanic, diagnose your vehicle’s starting issue and determine if my theory is correct.

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. Car has electrical problems and starting issues

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: Service ESC

The Electronic Stability Control (ESC) system is your car's traction control system. The traction control system monitors the steering stability of the vehicle and engages when loss of traction has been detected. This is done by the use of electronic...

Q: How do I enable the power running boards?

The Running Boards on your truck are there to make it easier to get in and out of the vehicle. The Power Running Boards will move to your selected position automatically. To enable the Power Running Boards. Go...

Q: How do I use the engine block heater in a 2012 Dodge Ram?

The engine block heater helps heat up your engine during very cold weather. If your vehicle has the engine block heater, you should always use it when starting your car in extremely cold conditions. Here’s how. Locate the engine...

Related articles

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...