Question about 2005 Chevrolet Avalanche
Red top keeps going dead if not ran every couple days. Battery 100% good!
Remove the positive cable from your battery then connect a test light in between the cable and the terminal of the battery. at this point it will be lit up. if you have an under hood light the bulb will need to be removed as well as the radio fuse and unplug any thing from the cigar lighter. remove the dome light fuse. if the test light is still lit up then you have a parasitic drain. the first thing i would do is remove the large red wire from the back of the alternator as a shorted field is the most common form of parasitic draw, if the test light is still on and are sure that everything is off and unplugged then start removing fuses one by one while checking if the test light is still on. once the test light goes off then you have found the circuit that is causing the draw. repair will depend on the circuit
Posted on Jan 20, 2013
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Posted on Jan 02, 2017
Something is obviously putting a drain on the battery, if all the things you had checked are good. If you disconnect the negative terminal on the battery touch it back, it should spark a little, but not alot. If it sparks quite a bit you know something is staying on that shouldn't. Possibly a glove box light, or if your truck has a light under the hood the mercury switch in it may have gone bad causing it to stay on. If it's taking 8 days to go dead you'll be looking for something small. I hope this helps.
Posted on May 10, 2009
Have you checked to see if the alternator is charging ? Run a volt meter on the battery with the engine running, have to have more than 14 volts. If 13 or less, then replace the alt.
Posted on Jan 18, 2010
If you have a multimeter then put the negative lead to a good frame ground and the positive lead to the negative battery terminal and set the multimeter to measure 12VDC. With a "parasitic drain" you should be able to see some voltage. Next start by removing then replacing one fuse at a time and when you remove the fuse for the circuit with the drain you should no longer be able to see a voltage reading on the multimeter. Check which system the fuse was for and then isolate which component in the circuit has the problem.
Posted on Jan 26, 2010
Disconnect the auxiliary power cable from the under-hood distribution center that runs to the anti-lock brake controller. Remove the ignition relay from this distribution center (this will isolate/eliminate/indicate the problem as the ignition switch). Unplug any GPS add-on device, and any radar detector, stereo amplifier add-on, I-pod, trailer brake controller add-on, anything that did not come on the truck from the factory. These can be frustrating.
Posted on Feb 13, 2010
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