Skip the auto shop - Our mechanics make house calls

Q: Car continually won't start

asked by on

I originally bought this car for my daughter and she’s been away at college, so the car has been sitting undriven. The battery was dead when I first bought the car, so purchased a new battery and it started. I don't drive this car much, but when I do it keeps quitting (six days of not being driven). After charging the battery again, I disconnected the negative terminal and I’m getting a .3-.5 Amp draw. I also disconnected the middle connection (DC - DC Connection) on the positive side of the 12 V battery. The amp loss went to 0.

Yet again it is dead today. When putting the charger on it again the 12 V battery was charged, but the dashboard display showed that the big battery bank was dead after I got it started. I'm considering about the parasitic draw. I'm not sure if this problem is inherent to the car or what the fix would be. Another detail is that this car has a remote start. Can you give me direction what to do next to find the fix for this car?

A: A .3 to .5A draw on the low voltage system ...

A .3 to .5A draw on the low voltage system is extremely high. The low voltage system draw should not exceed 80 mA with the vehicle in sleep mode. This should be fixed first before looking at the high voltage system. Setting up a draw test and removing fuses one at a time on the low voltage system to determine which circuit is creating the draw is the first step in correcting this issue.

Note that the high voltage system should be disconnected using the manufacturer’s procedure before attempting to do any electrical work on this vehicle, as serious injury or death can occur. I recommend having a certified mechanic look at this issue in order to safely diagnose the starting issue and help you get you get your car back on the road.

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: Car is hard to start - 2000 Honda CR-V

Hi there. A car that is difficult to start in the morning can be caused by a battery that is losing cold cranking amps, a faulty starter solenoid, distributor or ignition coils that are worn out, or fuel system components...

Q: Fuel rail injection pressure sensor

Hey there, thanks for writing in. It is in the top center of the motor on the fuel rail. You have to remove the upper intake manifold to get to it.

Q: Car dies while driving

The most common problem encountered by other owners for engine stalls has been the crankshaft sensor. The crankshaft sensor sends a signal to the engine computer to tell it that the engine is turning. If loss of this signal happens,...

Related articles

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...