Skip the auto shop - Our mechanics make house calls

Q: Repeated dead batteries - 1990 Honda Accord

asked by on

Have replaced battery in my 1990 Honda Accord 5 times in 18 months. Every few weeks it goes dead, like this morning. Was told that the alternator isn't the problem. Mechanic said a scan showed my radio antenna was incorrectly wired and he disconnected it entirely. New battery after that has lasted 4 months. Note: although my radio antenna is apparently disconnected, my radio works just like before, no static or fading in and out. Wondering if it's really disconnected? I do NOT drive a lot, I know that's an issue, but any car with a new battery should be able to sit in a garage for a week or 10 days at the most and not go dead. Please help!

My car has 137000 miles.
My car has an automatic transmission.

This sounds like you may have a slow battery drain pulling power from somewhere in the car. Start by checking to be sure all interior lights, etc. are off when shutting the doors. Check to make sure things like the stereo are not powered on when the key is off.

This may also be something caused by a bad or failing voltage regulator. This is a unit that regulates the charging amperage of the battery by the alternator. When this is not working properly, it can cause the battery to not be charged sufficiently, resulting in a dead battery much more frequently.

I would recommend having a professional mechanic, such as one from YourMechanic, come to your location to inspect your charging system and suggest any necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Intermittant vibration along with knocking near front passender wheel.

What you are describing sounds like a wheel bearing that may be starting to fail. A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface...

Q: Guage, fuel and thermostat needles moving very fast

You may have a connection that is getting corroded and is causing intermittent connection problems. If the problem happens again then have the connection to the dashboard cluster disconnected and then add dielectric lube to connection and pins. At the...

Q: Battery keeps getting drained

If the battery is draining down over time, then there is a parasitic draw that is draining the battery. A parasitic draw test needs to be done on the vehicle and once set up, the fuses need to be removed...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.