Dead Car Battery
Dec 2, 2018 12:53:28 #
Dec 2, 2018 13:22:24 #
Ront53
Loc: Maryland
I have an out of dash GPS, and if it is left plugged in for over a week with out the vehicle running, the battery will die. Another situation...An interior light left on but not seen. Map light under mirror was a fast killer.
Dec 2, 2018 14:09:46 #
I had the same thing happen on my Nissan when we went out of town a few weeks ago. I put it on my small charger and it's been working okay since. I think I may have left a dome light on or something. I never figured it out.
Dec 2, 2018 14:10:15 #
Frayud
Loc: Bethesda,MD
The 12volt (not the main battery) on my 2007 Camry Hybrid (25,000 miles) failed. Had to get it towed to the repair shop because even though a jump-start would get it started, the hybrid feature would cut it out at every red light and stop on the way to the shop. The towing was "free" but the cost of the 12volt was $397!
Dec 2, 2018 14:52:48 #
You can also check the alternator by disconnecting the battery while the car is running. Make sure the heater and accessories
are on. race the engine a little. If the car dies the alternator is bad. If the car continues to run the alternator is good.
Note The only function of the battery is to start the engine. The alternator replenishes the battery and runs all electrical equipment.
Captain Al
are on. race the engine a little. If the car dies the alternator is bad. If the car continues to run the alternator is good.
Note The only function of the battery is to start the engine. The alternator replenishes the battery and runs all electrical equipment.
Captain Al
Dec 2, 2018 15:16:20 #
HOHIMER wrote:
Here is another quick way to check for parasitic d... (show quote)
There is a slight draw on ALL modern cars so this is not a good indicator of a problem, there will always be a spark.
Dec 2, 2018 15:21:23 #
Al Freeedman wrote:
You can also check the alternator by disconnecting the battery while the car is running. Make sure the heater and accessories
are on. race the engine a little. If the car dies the alternator is bad. If the car continues to run the alternator is good.
Note The only function of the battery is to start the engine. The alternator replenishes the battery and runs all electrical equipment.
Captain Al
are on. race the engine a little. If the car dies the alternator is bad. If the car continues to run the alternator is good.
Note The only function of the battery is to start the engine. The alternator replenishes the battery and runs all electrical equipment.
Captain Al
Hey that is cool!! Now since the alternator will not sense battery voltage it will go wide open ( high voltage 16+ Volts) and you may very well burn out a few of the smaller light bulbs or fry some of the solid state electronics. DON'T DO IT Folks.
Dec 2, 2018 15:24:59 #
Ca Pb batteries can and do go dead with little warning, unlike lead acid batteries. A few years ago I stopped for gas. I shut off the ignition. The lights were not on. I had just driven 150 miles. I pumped my gas. Got in and the pickup would not start. The battery was dead. It had cranked up immediately about an hour and a half before after sitting for 18 hours. I bought another battery and all was well for 4 years.
Dec 2, 2018 16:28:33 #
Have done this for years and have never had a problem. you only turn on head lights air conditioner
and any other heavy drain items, and for a very short time.
Captain Al
and any other heavy drain items, and for a very short time.
Captain Al
Dec 2, 2018 17:07:38 #
New batteries just have a shorter life span
They will just go dead at some point.
I drive a truck with 4 heavy duty batteries that pbly weigh at least 50 lbs each.
If I leave the truck for over 3 days, there's a switch that totally shuts off all power from the batteries. Otherwise, all the electrical stuff will drain the batteries, although everything I can turn off is shut off....
Most rv's have or should have a battery kill switch as well.
They will just go dead at some point.
I drive a truck with 4 heavy duty batteries that pbly weigh at least 50 lbs each.
If I leave the truck for over 3 days, there's a switch that totally shuts off all power from the batteries. Otherwise, all the electrical stuff will drain the batteries, although everything I can turn off is shut off....
Most rv's have or should have a battery kill switch as well.
Dec 2, 2018 17:16:35 #
My 2006 MB senses battery voltage and disconnects any loads accidentally left on preventing the battery from discharging below that necessary to start the engine - it has saved me multiple times. Surprising all cars don’t have this feature.
Dec 2, 2018 17:59:21 #
Al Freeedman wrote:
Have done this for years and have never had a problem. you only turn on head lights air conditioner
and any other heavy drain items, and for a very short time.
Captain Al
and any other heavy drain items, and for a very short time.
Captain Al
And I have repaired car where people have done this and it wasn't cheap.
Dec 2, 2018 18:22:15 #
Manglesphoto wrote:
And I have repaired car where people have done this and it wasn't cheap.
An alternator is not designed to operate without a battery period, the battery provides a steady field to the stator to maintain the correct output. With a bad or weak alternator the battery will eventually reach a point of discharge so bad that a small current drain will discharge it completely in few hours.
Dec 2, 2018 23:04:39 #
melismus
Loc: Chesapeake Bay Country
Jerry,did you measure voltage directly on battery terminals? Clamp-on connectors are notorious for sudden and total failure.
Dec 3, 2018 01:02:55 #
TheShoe
Loc: Lacey, WA
ephraim Imperio wrote:
If any one cell goes dry, the battery is toast. That one cell will be shorted.Hey jerry,
I had the same problem with my Mercedes AMG car. Just call triple AAA. They have a handheld battery charger that will charge and wake your battery up. I guess if according your test it has 345 then AAA can wake it up.
effie
I had the same problem with my Mercedes AMG car. Just call triple AAA. They have a handheld battery charger that will charge and wake your battery up. I guess if according your test it has 345 then AAA can wake it up.
effie
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