Question about 1994 Honda Accord

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I believe that the alarm system in the car is draining the battery also causing the car not to start.....I want to disconnect the alarm system or disarm it but cannot locate the valet switch...my friend states there are multiple switched with numbers assuming one of them is the alarm valet switch...can i have your advice please..

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  • Honda Master
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This sounds like a factory alarm, so it is unlikely that it is draining the battery. Much more common is alternator diodes. diagnosis is pretty easy for a shop, consider using one for this issue.

Posted on Sep 09, 2010

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WHAT'S THE CAUSE BATTERY DISCONNECTED


What kind of car are you asking about and are you buying it or do you own it? Most times that a battery is disconnected is to prevent drain, usually a parasitic drain caused by computer, if storing for a long period of time or many times the disconnect is to try to clear a computer code. The problem with doing this can cause the computer to do an anti theft lock out that will prevent the car from starting. Especially a Chrysler or Dodge.

Jun 09, 2015 | Cars & Trucks

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Disconnect alarm


Yes,is possible.Because it'son when sitting still/not driving.Along with a lot of other things,like the cronemeter/clock.This stuff will drain a battery after sitting for a good while.Slowly,but still a drain.Most likely the battery has been in use for a good while and may need replaced,but if you don't wanna replace the battery,just disconnect the alarm system or pull the fuse from the panel to deactivate it.

May 05, 2014 | 2007 Chevrolet Equinox LS New Cars

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My alternater and battery test good on my 01 kia spectra.But, After putting the fully charged battery in my car, it slowlky died in on ly a few blocks drive?


Connect an ammeter in series with the battery positive terminal and battery positive lead. With ALL systems off, including alarm, door lights etc and with doors closed you should have a reading of only 0.03 amps.I'm guessing that yours is higher as it sounds like you have a parasitic voltage drain.If indeed it is higher, then disconnect any alarm system first and check your amps again. Every time you disconnect something, go back and check your amps.Once you get your amp drain back to normal, then you have managed to disconnect the system responsible for the high current drain.
The most likely candidates are always the alarm system, then stereo, then GPS tracker. After that you will have to start pulling more fuses, one by one and letting the vehicle rest for a few minutes after each thing is disconnected before taking a reading.
BTW, if it is the alarm which is drawing a high amp drain, then it is more often than not the alarm siren back up battery which has failed.
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The car soulds like the battery is low but when it starts the flashers come on.


Often an alarm system will register a low battery voltage and presume the vehicle's battery is being removed to prevent the alarm from going off. They will then begin flashing and or sounding the horn.
In your case, I would presume that the battery voltage is too low which may indicate either a failed battery, or a parasitic voltage drain.

First, get the vehicle started, and run the vehicle for a good twenty or so minutes to get some charge to the battery. If you don't want to waste fuel however doing this, then I suggest using any battery charger, as all we want to do is get some voltage back in the battery. If you are using a charger though, then charge on a lower voltage setting overnight.

Once you have the battery charged, run off any surface charge by turning the vehicle lights on for a minute, then turn them off again.

You need an ammeter for this next part:


Disconnect the battery positive terminal and connect the ammeter in series with the battery and positive lead.
DO NOT ATTEMPT TO START THE VEHICLE!

With all vehicle systems off, the key out, doors closed and alarm 'OFF', bonnet close switch depressed, or bonnet/hood clasp closed (need a screwdriver), take a reading from the ammeter.
After probably no more than twenty minutes, the ammeter should be reading 0.03 amps and not much more. Anything like 0.5 or 1 amp means you have a battery drain.
If this is the case, then start by disconnecting the alarm system. If the alarm system has it's own separate speaker/horn, then disconnect this first. Many of these horns have backup batteries, which only last three or four years before they fail, which causes them to constantly draw from the vehicle battery and then flatten it when parked.
Every time you disconnect an item or system, check that ammeter again to see if the amps have returned to normal. Pull fuses one by one, checking the ammeter each time for any change until you find the system which is causing a drain, then attend to that system.

If your amps are normal however and your battery is still loosing charge when parked for any short length of time, i.e. a few days or so, then your battery is at fault and requires replacement.

Just before changing your battery, do one last check, which is with the vehicle running. You need to reconnect any battery cables, and start the vehicle. Using the voltmeter once more, check the voltage across the terminals with the engine running. This is your charging voltage and it should go up to around 14 volts if revving the engine slightly. If still around 12 volts only, then you have a charging issue, which is probably the alternator.

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How do I disable the stock alarm on my 2001 Oldsmobile Aurora 4.0


Maybe you are in valet mode. This will drain your battery.

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I have a 93 grand cherokee that has a drain. Replaced the alternator, battery and removed an old after market alarm that had been installed by the previous owner because he believed the stock alarm was the...


The alarm system is not causing this, that much i know for sure. How many volts is the drain? Anything over 8 volts and 300ma is considered a drain. The most common cause of a drain is interior light being left on or coming by themselves due to defective door switches, this includes the lights in the visors for the vanity mirrors and the glove box and under the hood if so equipped.

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2 Answers

Something is draining my battery usually within hours, have a new alternator been checked, passes all diagnostics at the shop for a week, brought it to work and battery was drained by the end of my shift,...


The car alarm does not really consume that much power unless it is always triggered. Check the wiring first if there are loose connection or short caused by exposed conductor or bad terminals that may just need cleaning.
If you have a multimeter you can use that while the car is turned offto trace where the current is the strongest, that is where the drain is.

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1 Answer

Car wont start


Sounds like you have a shorted wire causing a drain. I recommend disconnecting the alarm all together which should stop the short so battery can remain fully charged.

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2 Answers

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That will be a good place tp start. Do this just to make sure that it is the alarm system and nothing else.

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Best bet is to disconnect the clock and disable the alarm and see if you still have a drain. If you do, it's likely that it's something inside the computer (although that seems far-fetched). Chances are there are more components than that in the suspect circuit. However, that being said, I'd suspect the alarm system - the ECU doesn't really draw power with the car off, per se, and the clock is a minimal drain. Something shorting out in the alarm however, will likely drain your battery quickly. I have seen faulty sensors added as part of an alarm system cause battery drains in the past.

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