Tip & How-To about Ford F
First; purchase a 12 volt test light from an autoparts store; these look like a screwdriver with a lamp in the handle and, a spike where the screwdriver tip would be; The lamp is attached to a cord that exits the rear of the test light and, terminates in a alligator clip. When the tip of the test light is attached to a 12 volt source; like a positive post of a battery and, the cord of the test light is grounded; like on the negative post of a battery the test light lamp will light, Letting you know that electricity is moving: (doing work) Sometimes electricity will move when it should not, this makes your battery run down, over time. This problem usually can not be found unless you do this: remove the negative battery clamp from the negative battery post then: connect the test light alligator clip to the negative clamp you just removed, and the test light spike to the negative battery post. The lamp should light. This indicates that you have a short to ground: a "leak" that is draining your battery as, if there is no light from the test light you have no problems unless you have a domelight on or, the ignition in the on position for in a "good" car nothing should be lighting the test light bulb.
If you see a bright light you have a big short. If you see a dim light check your alternator for a short through the diodes. With the front door open and, the door button held closed, key off; Look at the lit test light and, start pulling fuses one at a time until the test light goes off; this is the "bad" circuit. Then: replace the "bad" fuse and, just check everything in that circuit one part at a time until the test light goes off again...you have found the problem that causes your battery to run down.
Posted by Jim... on
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