Q: After new battery and alternator, truck won't start

asked by on

I have a new alternator, new battery, and a good starter, but the battery is continuously dying. At a local auto shop, I was told that everything was okay, but the very next day, my truck won’t start. It is around 5 times that this has happened. They did say that there might be a battery drain and to go back if it happened again. Sure it happened again! What do you think is happening and can you tell me please, what will correct this?

Hello! It sounds as if your have a parasitic drain present. I would have a technician perform a parasitic draw test on the vehicle. It should be fairly easy to isolate the circuit that is draining the battery by performing this test. An easy way to perform such test is by connecting a digital multimeter to the battery then pulling fuses one by one to way for drastic reading changes.

If you need some assistance with this check, contact a certified mechanic who can diagnose your battery problems firsthand and make the necessary repairs a your own convenience.

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. After new battery and alternator, truck won't start

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: How to tighten a serpentine belt ?

Hello, thank you for writing in. You cannot tighten a serpentine belt. There are two considerations to make. One, is that the belt stretches out over time, and will end up being too long to function correctly. In this case,...

Q: can you replace an alternator on a Lexus 2007 350 ES without removing the bumper ?

If your ES350 was built after March 2006, you have to remove the bumper. If you have the alternator replaced by a mobile certified mechanic, you will save money and it will be a lot more convenient because the repair...

Q: Q: Wont Start

Make sure the battery cables are clean and tight. You need to make sure you check ALL fuses to see if there are any that are draining the battery. Crank your car for 15 seconds. Do this 3 times. Check...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.