Question about 2007 Chevrolet Silverado 1500
Put a new battery in and when the truck sits over the night, the battery is dead come morning. When I boost the truck it works fine but something is draining the power over night.
Have the alternater checked. The voltage regulator may be sticking and leaving an open circuit.
Posted on Feb 10, 2012
You have a current draw, so you need to isolate the problem. It could be bad diode(s) in the Alternator, but it could also be something else.
If you don't already have one, I would get a DC AMP Clamp Meter (around $50 from Sears) connect it and take note of the current draw reading. Then start pulling fuses one at a time until the current draw goes away. Once you have isolated the fuse that made the draw go away, find a wiring diagram (there might be one here http://www.bbbind.com/free_tsb.html).
Then reinstall the fuse and start unplugging items on that circuit until you find the culprit.
hope this helps!
Posted on Nov 14, 2014
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Posted on Jan 02, 2017
I guess that your battery is being run down by a device sapping energy from the battery. I would guess off the top of my head that it is the brake lights as that is a common problem of vehicles. The brake light is activated by a small switch mounted under the driver's side, up near the leg of the brake pedal. That switch is spring backed so that when you depress the pedal the shaft of the switch is let forward and turns on the brake light. That switch sometimes comes loose or half cocked in the housing and stays activated all the time until you let the brake pedal loose and the leg of the pedal depresses the switch shaft just enough to turn off the brake light. The solution is to replace the switch, at about 15 bucks at your Advance Store. or 10 bucks plus shipping on the internet. You can check when you leave the vehicle to see if the brake lights are still on. Mind you, this does not happen all the time as sometimes it is cured by the action of the brake pedal knocking the shaft back in line
Posted on Jan 25, 2011
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