Q: Is my sub system causing parasitic draw since it's connected straight to the battery?

asked by on July 01, 2017

Battery draining overnight, tested battery/alternator/starter nothing bad all got perfect readings.

My car has 185000 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car shaking when braking over 50 MPH
It sounds as though you may have a warped set of rotors. This is not that uncommon when replacing rotors. Furthermore, the surface where the rotor mounts to the spindle should be clean; if the area has a build-up of...
Opinion on a 2016 Honda CR-V Touring
Good vehicles. Personally, I would buy a Toyota myself, but I've got customers with CR-Vs that are very happy driving them around for years and years. They are good cars. If you have a choice, and you don't mind driving...
Car keeps dying
There are usually two different issues that cause the engine to stall or reduce RPM in situations like this. The first thing I'd look at is the idle control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) or sensors that monitor the fuel system. The second...
Car won't shift out of first gear
With the age and mileage of the vehicle, it is possible there is an internal failure inside the transmission. It is possible the front pump has failed. If this happens, the internal fluid pressure will not be sufficient to engage...
whats the difference between an upstream front and a upstream rear?
Hi there - your understanding and terminology oxygen sensors (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-oxygen-sensor) - "upstream" and "downstream" are correct - upstream is between the engine and (before) the catalytic converter. Downstream is after the catalytic converter. I would be suspicious enough of a...
How do i remove a stripped bolt from a battery post clamp?
Hello. From what you describe it would appear that your battery terminal will likely need to be replaced. If you do not have the resources to have it professionally replaced then replacing it on your own could be another option....
My 2004 mitsubishi dalmante will start but wont go into gear
Hello, thank you for writing in. Transmissions tend to show these types of issues when the transmission fluid is low, contaminated, or burnt. You should start with checking and changing the fluid first. From there look into transmission solenoids, the...
Mazda3 not accelerating
At 200 thousand miles it could be just about anything. You didn't mention f the Check Engine Light is on, but If it is not on, it probably should be. Turn the key on without starting the engine, the CEL...
Bypassing oil cooler
The only way to determine if your operating conditions permit bypass of an OEM engine oil cooler is to install an oil temperature gauge. If gauge readings are always below 240 degrees F. (but above 212 degrees F.) you do...

Related articles

A Buyer’s Guide to the 2012 Honda Pilot
If If you’re in the market for a larger SUV, you might think that you have to resign yourself to a gas-guzzling monster like a Suburban or a Chevy Tahoe, but that’s really not the case. With the 2012 Honda...
The Best Used Cars to Buy If You're a Dog Trainer
If If you are a dog trainer, you expect a lot from your vehicle. You want a ride that is safe, roomy, and of course, dog friendly, since your training operation will often mean that you need to transport the...
Top Automotive News & Stories: September 24-September 30
Angry Civic Type R, 350 special edition Ferraris, Infiniti variable compression tech, Mercedes' electric future, and more.