Question about 2000 Mercury Mountaineer

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With new stereo equipment the stereo or radio drains the battery dead

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Depending on how mch wattage you have to your aftermarket radio you might have to hook it up to an accessory battery separate from the one that runs your car. before you do that tho take your car to an auto parts store that can test your alternator and battery for free. try advance auto or auto zone.

Posted on Jul 29, 2010


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New battery to nissan micra 2009dec,2016.drains completely if not used for one day. left doors open but boot wont unlock. had faulty radio fuse removed as thought that was the cause but just the same.

similar situation with daughters car . had to have good test equipment hooked to it and then they disconnected things one at a time until the meter no longer showed a discharge turned out to be part of the radio stereo equipment . cost was too great to fix so she left it unhooked forever .

Jan 09, 2017 | Nissan Cars & Trucks

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Replaced alt/ battery 2005 PT cruiser is good but i loose the charge and battery is dead by morning ...even after running my car !

Connect an ammeter and set to the 2 amp scale and check out the current drain with the ignition key removed. Remove a fuse one by one until the current drain goes down. That is the fuse that is connected to the power line that is responsible for the drain. Check all of the accessories, etc on that line for the draw.

In meantime till you resolve the issue just disconnect the negative battery terminal till next time you want to use the car so the battery does not drain.

Sep 15, 2015 | 2005 Chrysler PT Cruiser

1 Answer

1989 buick park avenue battery wont stay charged

A possibility is an ignition fuse has blown when the radio was removed. Does the battery light light up when the ignition is turned on. The alternator needs that light to energise and charge, (without it you just run the battery flat), failing that charge the battery, connect an amp meter in series, with every thing switched off, should have a reading of about 0.5 amps (Time clock). If above 2amp that is what is draining the battery. Watch meter and pull fuses one at a time, when the reading drops, that is the circuit/equipment that's causing the trouble.

Dec 31, 2013 | 1989 Buick Park Avenue

2 Answers

2007 Pontiac Torrent Stereo drains battery

This is the radio diagram for fuse 17


Nov 23, 2013 | Pontiac Cars & Trucks

1 Answer

Can a new car radio kill the battery?

Yes and that was due to bad installation. I have had 3 car stereos installed on my 98 RAV4 through Best Buy and never had battery problems. I even had 2 amps installed as well but the installers had to make me buy this 200-dollar thing that would not drain the battery.

If you are getting a drain through the radio's power supply it could eventually drain down the battery if it was improperly installed, I would pull the fuse for the radio and see if the drain continues, if the drain does not stop there is another short somewhere. To learn more :

May 16, 2012 | Cars & Trucks

1 Answer


seems impossible to me unless it has a hot wire connected directly to the batter. You could put a toggle switch on it and it should not drain the battery

Apr 18, 2012 | 2004 Chrysler Crossfire

1 Answer

Battery dains when not running

The battery current draw may be caused by a few things, here are some to check: the most common is that a light stays on like the dome light, the brake l;ights may be staying on,aftermarket accessories can cause it as well, audio amplifiers or stereo equipment or aftermarket alarm systems, very common.

Feb 24, 2012 | 1993 Toyota Celica

2 Answers

I put a new battery in my villager and my radio won't work. Any ideas?


If the radio turns on but does not operate (stays locked), then the anti theft kicked in. In that case you need to go to the nearest dealer to have the stereo unlocked.

If the radio is completely dead, then the fuse is gone. If radio is factory one, then there is one or two fuses in the in car fuse panel (they should be 15 amps if no amp is installed). Aftermarket units may also have a fuse located at the back of car radio. You will need to pull out the car stereo if that is the case.



Feb 06, 2011 | 2002 Mercury Villager

1 Answer

Battery loses charge

you may have shorted some wiring when you installed the new stereo

Aug 31, 2009 | 2002 Mercedes-Benz C-Class

1 Answer

Factory Stereo Drains Battery

I have had this problem with a few of my cars and I thought the same that my battery was gettin drained by the stereo but really my battery was going bad hich resulted in the radio staying on for some odd reason, but i replaced the battery and all is good with no more problems, so I would take my battery down and have it tested.

Jan 31, 2009 | 2005 Chevrolet Impala

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