Today vehicle's computers operate everything from air conditioning, radios, air bags,
alarm systems, anti-lock braking systems, traction control, ride control, cruise
control, electronic digital and analog instrument panels, automatic transmissions,
and last but not least, emission and engine controls. Computers electronic parts
are easily damaged by improper installation or testing and are very sensitive to
voltage overloads; it does not take much of a voltage spike to ruin a component.
The major manufacturers have reported that as high as 80% of all computers returned
for repair were found to be alright! For this reason, a complete computerized engine
analysis can save you money by correctly diagnosing your vehicle's problems the first
time! It is even more important to choose a shop that has the latest computerized
diagnostic equipment and a computerized information system. At Rob’s we utilize
the latest in state of the art Snap-On Automotive Diagnostic Equipment.
Electrical System Analysis
Your electrical system is comprised of two major systems - a charging system and
a starting system. A battery that goes bad can be the result of several problems;
over charging, electrical drain as a result of a short or under charging as a result
of a bad drive belt, voltage regulator or alternator. The charging system keeps the
battery from going dead as the demand for more voltage is required as a result of
accessory load. The charging system is comprised of an alternator, voltage regulator
and the belt that drives the alternator.
Your starting system is comprised of a starter motor, starter solenoid, starter relay,
neutral safety switch and ignition switch. Starter solenoids and relays can be either
mounted on, or made as a part of the starter and some can even be mounted in remote
locations. A vehicle that doesn't crank may or may not totally be caused by the starter.
Your starting system is less complex but just as important. The battery must have
enough capacity to turn the starter and overcome the resistance in the engine. That's
why checking the charging system is necessary. Diagnosing the starter system requires
several different tests. A starter draw test will determine if the starter is drawing
more amperage than is needed to turn the engine over. A circuit test will determine
if all the other components are working properly and that voltage is present when
and where it is needed. An electrical analysis can save you money and future headaches
by diagnosing the problem right the first time!