Question about 2004 Chevrolet Silverado

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My battery (new in July 2010) was completely dead. When I connected the jumper cables - with neither vehicle running - the security alarm started. I shut it off with the button on the ignition key. Why would the alarm be on (and silent) with the battery dead?

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Bet it was set off and is why your battery ran down. Have had this happen before when jumping dead batteries.

Posted on Sep 06, 2010

Testimonial: "Sounds reasonable. I'll see whether the battery is O.K. in the morning. Thanks!"

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I fear there might be 3 problems and you have to exclude them one by one. Check battery termminals with a multimeter. With engine off should be 12.6 Volts or more. If not, then you need a new battery. With running engine should be at least 14Volts. If not, then you have charging system trouble. A stop at Autozone cand read engine codes, give you a print out explanation, and check the alternator for free.
You might have an battery leak. This is more difficult to diagnose. Disconnect the wire harnes from positive terminal of the battery, and conect a 12V / 1 amp bulb in serial. Avoid sparks, using aligator clamps, or computer might be damaged. The system will source 1 amper current because computers are switched in learning mode, but after 10 - 15 minutes the current should dropp in milliampers. If not start pulling off fuses one by one. If light turned off you find the problem. To find the amount of leak replace the bulb with multimeter set at 10 Ampers mode, you have to vait at least 10 minutes.
If security light is on, disconnecting the battery for 30 minutes and connecting a good battery, normally clear the code. In some old cars locking up the car and and unlocking the driver door with key temporary cures the problem. If security light goes on again you have to go to the dealer for a check and advice ONLY. This will cost you $65 to $100 but you vill get a good answer. Thousands of dolars diagnostick systems can be afforded by big dealers ONLY. Hope this might help.

Posted on Sep 07, 2010

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I'm just looking to see if it possible to use an


Sure! It is always possible for one vehicle to jump-start another vehicle. However, EXTREME CAUTION should be used and jump starting techniques should be followed carefully. Otherwise severe vehicle damage can occur. Here is the way to do it:

1. Connect the jumper cables to the good vehicle. (the one that is doing the jumping)
Make absolutely certain that he RED cable is connected to the POSITIVE battery post (the larger post on all top-terminal batteries, also marked with a "+") The BLACK cable then connects to the NEGATIVE battery post (smaller post marked with a "-").

2. Connect the other RED cable end to the POSITIVE post on the "dead" vehicle
3. Connect the other BLACK cable end to a metal part of the engine AWAY from the battery. (This is for safety to prevent sparking or arcing from causing the battery to explode.)
4. Run the engine on the good vehicle for 3 or 4 minutes to allow the dead battery to partially charge. (skiping this step can cause your charging system to overload and can cause damage to your vehicle including burning the alternator up.)
5. Attempt to start the dead vehicle. If is starts right up, then there is no problem. If it does not start immediately, I recommend getting some professional help with the situation because there is a problem that could possibly damage your vehicle if you continue to try to jump the dead vehicle.

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sounds like you are on the right track. Hook the jumper cables up to the dead car first. The red cable should go to the jumper terminal as you mentioned and a good place to hook up the black cable is the bolts on the strut tower.

then with the other car running hook up the red lead to the cars positive battery cable and then the negative to a good ground. Let the two cars sit for about 5 to ten minutes to give the dead battery a chance to charge.

Once the dead car is started let it idle with the lights turned off for at least 45 minute to an hour or drive it for the same amount of time with the light on (I assume you will be driving in the dark) or if its day time drive it for 30 to 40 minutes with the lights off. This should be enough time for the alternator to charge the dead battery.

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