Mystery Battery Drain
courtesy of Bob, The Auto Answer Man
I have a Chevy with a big problem. Batteries go dead when the ignition is off. We have put three new batteries in over the last 6 months. Some said they were too small. The last one I put in was what the book called for. It is 1000amp / 800 cold cranking. I have checked for drainage with my voltmeter at several stages and don't see any drain. My son-in-law who was a mechanic for 30 years helped me check all the circuits at the fuse box and found no problem.
I took it to an Auto Electrical Specialty Shop. They charged me and said nothing is wrong. "Bring it in when the problem exists." That's a laugh How do I bring it in dead! When I go away for a couple of days I unhook the battery cable. I am at a loss. I feel it may be an intermittent short, but, don't know what to do next. It is a Caprice Classic with the a V8 and automatic
Here are a few things to try. One, remove the negative cable from the terminal and put a test light between the cable and the battery post. If the light glows, there is a drain. To find what circuit is causing the drain, remove one fuse at a time until the light goes away. Then, install them one at a time. When the light glows there is a drain, when the light is off, the bad circuit was removed. You may not get the light to turn off. In that case, it means that there is a drain in some other circuit that does not run through the fuse panel. First place I would look at is the starter. Starters have been known to short out at the solenoid and cause a constant drain to ground.
Bob, The Auto Answer Man
Have a car care question? Visit our automotive center and see if we've already answered it or a similar question.
Also in Home
- How to seal your basement from outside moisture
- Are you ready to buy your first home? Video
- How to clear a clogged drain naturally
- Indoor container gardening
- Hot? Turn on the furnace!
- The essential starting point to lower summer energy bills
- 6 cheap, effective home security solutions
- 5 simple and affordable luxuries for your home
- 5 frugal ways to expand your living space
- Top 10 DIY mistakes made by home 'handymen'
- How spring cleaning can save you money
- 4 secrets to budgeting for a home purchase
- Find the best mortgage rates in your area
- 3 ways to use a mortgage calculator
- Mortgage calculator: Calculate your payment and more
- Home equity calculator: HELOC vs. line of credit
- Mortgage refinance break-even calculator
- How much money can I borrow for a mortgage?
- Who offers the most home insurance discounts?