Question about 2005 Chevrolet Corvette

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I have a couple problems, the main one is that the car which is 100 percent stock has a phantom amp charge that something is turning on in the car every 10 minutes or so when it is turned off. I have had and personally looked several times at this on a couple of am meters but I cannot find out what is causing it and no one else can either. It causes the battery to go around 10 volts and wont start in the mornings

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  • corybrick Oct 01, 2010

    I have a 2005 corvette that continuosly has a power serge when the power is off...... therefore the battery dies in the morning... Its so common in corvettes that have a name for it dbs dead battery syndrome but I cannot find a way to fix it. Several people have said it has to do with the key that sends a signal to the car every ten minutes or so but it ramps up to 22 amps which cant be from a key. Someone must know the answer.....



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DBS is directly related to the requirement that all 2005 manual transmission cars must be placed in reverse for a proper shutdown of the electronics.

Assuming that you always shift to reverse when shutting down, DBSrefers to an unexplained battery drain on properly shut down cars, and typically occurs within 48 hours of the car being turned off.

If this is the cause of your problems, rather than just a weak battery, GM has issued a TSB that calls for a reflash of the BCM, or Body Control Module. This reflash has been completely successful in addressing the problem. I don't have the TSB # handy, but any dealer should be able to find it in their computer database. Or, y
ou can go to and click on technical service bulletins and recalls, enter your vehicle info and see all tsb's for your it.
Good Luck!! A 4 TUMBS rate for this post will be appreciated!! Thank you for using FixYa.

Posted on Oct 01, 2010

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Electrical problems are starangely hard to find on some cars. Remove one fuse each night until the short is found instead

Posted on Oct 01, 2010

  • frank thomas wilson
    frank thomas wilson Oct 02, 2010

    the security system does have its disadvantages althought was the problem the alarm will keep going off if that was the problem



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Your probably going to need to take to a dealer for this , I don't how much you know about modern automotive charging systems . Plus it would help to have a professional scan tool ! The charging system on you vehicle is computer controlled ! The engine control module (ECM) controls the generator through the generator L-terminal control circuit. The signal is a 5-volt pulse width modulation (PWM) signal of 128 Hz with a duty cycle of 0-100 percent. Normal duty cycle is between 5-95 percent. Between 0-5 percent and 95-100 percent are for diagnostic purposes. The following table shows the commanded duty cycle and output voltage of the generator:
The BATTERY SAVER ACTIVE message will display on the driver information center (DIC) when the vehicle enters a load shed 2 event. Refer to for load shed 2 setting criteria.
The electrical power management (EPM) system is designed to monitor and control the charging system and send diagnostic messages to alert the driver of possible problems with the battery and generator. This EPM system primarily utilizes existing on-board computer capability to maximize the effectiveness of the generator, to manage the load, improve battery state-of-charge (SOC) and life, and minimize the system's impact on fuel economy. The EPM system performs 3 functions:
It monitors the battery voltage and estimates the battery condition.

It takes corrective actions by adjusting the regulated voltage.

It performs diagnostics and driver notification
Load Shed 2 Start
Less Than 10.9 V
Battery has a net loss greater than 12 AH
Rear defrost, heated mirrors, heated seats cycled OFF for 50% of their cycle. The BATTERY SAVER ACTIVE message will be displayed on the DIC.
You have a charging problem or battery problem !

Feb 27, 2015 | 2006 Chevrolet HHR

1 Answer

Can the car alarm kill your battery but you can start the car but after you turn it off battey died again

sure, if you let the alarm drain the battery, this can destroy any stock battery.
The car batteries are not like golf carts and are not deep discharge rated. (so can be damaged)
so charge the battery, if it wont hold a charge, it is bad.
if it discharges silently, and darkly parked , that is phantom discharge
if is discharges , driving that is a engine charge system failure.
parked over night discharging is phantom discharging.
if the alarm goes off and stays in alarm , then dont use, it.
if the battery is happy with the alarm defeated then the Alarm is bad.

The battery measure 12.6vdc charged,(rested) "voltmeter"
and running measures, 13.3 to 15vdc at idle.

this one tool can solve this problem


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04 Trailblazer oil percent at 23 percent. I

turn the ignition switch to on do not start engine,withing 10 seconds depress the accelerator 3 times and turn key off,this resets the light to 100%,sometimes you have to do it a couple of times.

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1 Answer

After sitting for a while I can get about 2 normal sounding cranks when I turn the key and then nothing. I still have power so I don't have a clue. It started when my wife pulled out of the driveway...

no ,you dont have power.
the battery uses 100 to 500 amps to run the starter.
normal is 100amps , on warm day. really the starter is the ACID test of any battery.
the ignition uses 5 amps. (nothing) same with lamps. trivial currents.
the battery is not charged, , so charge it. or...
if the battery is bad , it will not take a charge and hold 12.6volts.
try a known good and charged battery in car. that work?
then either the battery was bad, or you left on lamps?
or the charge system failed and battery drained.
bad cranking 101
1: bad battery.
2: discharged battery (or any reason)
3: bad battery connetions, corroded lugs.
4: charge system failure.
5: phantom drain (dark current) or left on lamps over night.
1: put in fresh good battery.
2: start car, is voltage across battery terms near 14.7v?
yes, good charge system.
no?, its 12.5v, charge system is dead.

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1 Answer

2002 Avalanche. Voltage needle drops at idle with headlights, A/C on. New battery & 145 amp alternator just installed and have same problem. Any ideas???

check at the battery with a volt meter to see if it is charging properly, the gauges are not 100 percent accurate.

Sep 08, 2012 | Cars & Trucks

1 Answer

Hi someone removed a fuse from my 98 grand prix and now it wont start do you know which fuse this could be please

Lots to look at, fuel or ignition. The panel i wold guess they messed with would be the one under the hood (see picture below) In the other picture I gave you a diagram of the layout with numbers ot to guide you. This is for a 1999 but am 95 percent sure it is the same. fuses to look at: number 4- battery Main, 5 - ignition main , 7 - battery main, 8 - ignition main. Now the real ones to look at: number 25 - ignition module, 32 - fuel pump & 33 - electronic control module/powertrain control module. Now to a couple of relays in that same box that could be the problem. number 11 - ignition main & number 14 fuel pump relay. I would put money it's one that has to do with fuel. I really hope your weekend goes better. Good luck.


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My daughter has a 90 Thunderbird that had an original premium sound package. The stereo went kaput and she bought an after market replacement. I went to install it for her and unfortunately opened up a...

These cars have a factory amp system that will not operate correctly with an aftermarket stereo. You have two choices. You can either run new wires to the speakers your self which would bypass the factory amp. Or you can order the premium sound system Interface here scroll about half way down the page.

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My car is cranking but the other day I tried to crank it and it turned over but would not start. I noticed that it might be the battery, I took it to auto zone and they charged it to 100 percent I put it...

the battery light coming on usually indicates that the alternator is not check charge rate, check voltage on small terminal at rear of alternator with engine running, should be 13.5 -14v. check at battery if unable to reach rear of alternator.

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1 Answer

98 lumina battery dies after a couple of days if not driven

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