simplified conventional and electronic ignition
systems. Typical and most common electrical
troubles are also described.
Battery will not accept a charge-Make
the electrolyte level in the battery is correct and
that the terminal connections are tight and free
of corrosion. Check for fuses in the battery cir-
cuit. If the battery is satisfactory, refer to the
electrical system chapter for alternator tests.
Finally, keep in mind that even a good alter-
nator is not capable of restoring the charge to a
severely discharged battery;
must first be
charged by an external source.
2. Battery will not hold a charge-Check
battery for sulfate deposits in the bottom of the
case (Figure 29). Sulfation occurs naturally and
the deposits will accumulate and eventually
come in contact with the plates and short them
out. Sulfation can be greatly retarded by keep-
ing the battery well charged at all times. Test
the battery to assess its condition.
I f the battery is satisfactory, look for ex-
cessive draw, such as a short.
Bulbs burn out frequently--All
eventually burn out, but if the bulb in one par-
ticular light burns out frequently check the light
assembly for looseness that may permit ex-
cessive vibration; check for loose connections
that could cause current surges; check also to
make sure the bulb is of the correct rating.
a fuse blows, don't just
replace it; try to find the cause. Consider a fuse
a warning device as well as a safety device. And
never replace a fuse with one of greater
amperage rating. It probably won't melt before
the insulation on the wiring does.
Wiring problems should be corrected as soon
as they arise
before a short can cause a fire
that may seriously damage or destroy the
A circuit tester of some type is essential for
locating shorts and opens. Use the appropriate
wiring diagram at the end of the book for
reference. If a wire must be replaced make a
notation on the wiring diagram of any changes
in color coding.
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