Q: A previous owner installed a radio and misplaced a lead, when the heat, radio or ac is ran the battery drains what does this mean?

asked by on

I'm trying to price it out to see how much money I need to get everything fixed, the car is not mine yet, the owner as of now has had it for 3 months, everything else in the car runs perfect, she just spent $2000 replacing the battery and alternator.

My car has 172880 miles.
My car has an automatic transmission.

If the battery is new and charging system output has been measured and is within specifications, the only reason a battery will discharge is if the car sits for a long period of time (batteries will self-discharge even if not used) or if there are parasitic (excess) loads on any of the car’s electrical circuits. If there is excess current flow that is slowly draining the battery, a Mechanic would use an ammeter to test all of the various circuits until the faulty circuit is found. Then that circuit is traced to find the fault and repair it. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an electrical diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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. A previous owner installed a radio and misplaced a lead, when the heat, radio or ac is ran the battery drains what does this mean?

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: Car stalls while driving. It will start up after about 10 minutes.

Hi There, What you are describing sounds like an ignition coil pack that may be failing. Ignition coils are prone to this type of erratic functioning or heat cycling when they are beginning to fail due to the temperature fluctuations...

Q: I just changed my oil and everything went well until the test drive. The car started knocking and sputtering bad and smoke idk wha

Hi Andrew. Thanks for sending the question tonight. Changing the oil involves three basic steps, draining the old oil, removing the old oil filter, and installing new filter and oil. In some cases, if the oil filter is not correctly...

Q: Q: Overheating problem with my car.

Coolant system leaks completely disable the the engine cooling system from properly cooling the engine. This can cause serious engine damage if not addressed. The problem with some of these leaks, they are not detectable unless the cooling system is...

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 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...
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...