Your car’s electrical system runs because of several essential
components including: a battery, fuses, and an alternator. When
any one of these components fail, your car won’t run or it will
perform poorly. Unfortunately, it isn’t always apparent which
part is giving you the trouble. We’ll examine each component,
discuss its unique characteristics, and outline simple
maintenance options to help you make the proper diagnosis.
1. Alternators. Car
alternator problems are usually noticed when you realize
the juice to your headlights has been reduced. No longer can you
see hundreds of feet in front of you, instead the light barely
makes it past the front bumper. Check the wires leading to the
alternator and make sure that they are secure and free of
corrosion. Examine your alternator belt for cracks as well as
for tension. If your headlights are still dim, then it is likely
your alternator will have to be replaced. Don’t put it off as
the alternator can drain your battery.
2. Batteries. If your car won’t start, your battery may
be to blame. Most cars come equipped with sealed, maintenance
free batteries. Still, “maintenance free” isn’t an entirely
correct designation as corrosion can build up on the terminals
causing an otherwise fine working battery to fail. Remove the
cables, clean with a wire brush, and reattach the cables. Apply
lubricant to each terminal to limit future corrosion. If your
car’s battery is not “maintenance free” add distilled water to
each cell as needed. Use a good set of jumper cables to get your
car started. If the car still won’t start the battery is either
completely shot or the starter or solenoid [relay] are not
working. Battery life varies depending on what type of battery
is in your car and usage; consider replacing your battery every
3-5 years before problems arise.
3. Fuses. Your dash lights may be working, while your
left rear blinker has failed. If that is the case, it is likely
your electrical problems are with the fuses. You can pull off
the fuse panel [usually located under the dashboard] and check
to see which fuse has burned out. Today’s cars use transparent
blade style fuses that are rectangular in shape. Observe each
fuse and see if the internal wire has burned out. You can find
the fuse fast if the auto manufacturer has labeled each one by
circuit. If not, you will have to determine by a process of
elimination which fuse has failed and replace it.
Batteries and fuses are widely available at auto supply stores
and most will carry a selection of alternators too. If you find
prices for your Ford
alternator or BMW
alternator are too high, you can save plenty of money on
original equipment manufactured parts with some of the reputable
online providers. Shop with those retailers who have the widest
selection of inventory, the best prices, and the most favorable
shipping and return policies.
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