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Mark Gittelman

Troubleshooting car problems and DIY car repair

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Submitted Tuesday, July 03, 2007
Submitted by: Mark Gittelman (5,253) Silver Level Author Hall of Fame Top 100 Verified Account Industry Expert
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Take your time when troubleshooting car problems. Properly diagnose the vehicle and test the failed components. This will save you time and money on replacing unneeded parts.

In most cases, when I guess or even take an educated guess, I pay the price. Even though my educated guess comes with 24 years of hands on experience it is wrong nearly 50% of the time. This means I have just increased my diagnosis time, and wound up replacing a part that was not needed.

This brings me back to the proper troubleshooting of car problems. Get a good auto repair manual and perform all the step-by-step diagnosis that the troubleshooting manual provides. When you feel like you have found the problem take the extra step and test the individual component.

For example, let's say you are diagnosing an overheating condition. Your educated guess says that you should replace the thermostat. Why not go the extra step and actually test, the operation of the thermostat by throwing it in some boiling water and observing if it opens? If the thermostat does open while it is soaking in the boiling water you now know that this was not your overheating problem. Using the same example, you may feel that the electric fan motor needs to be replaced. Again, let's take the extra step and test the operation of the electric fan motor. Applying 12 V to the power side of the fan motor and grounding the negative side can test the cooling fan operation. If the fan motor kicks on and runs, you know that this is not the problem with your overheating condition.

The next step would be to test what turns on the cooling fan motor. In most cases, there will be a temperature switch and a fan relay that complete the circuit to the electric motor. Both the temperature switch and relay can be tested.

As you can see from the above examples, when you are troubleshooting car problems. There may be multiple answers to what is causing the problem. Just guessing, and throwing parts at the vehicle may cost you more than if you took the car into a repair center and had somebody else do the work.

The reason that we work on our own car and perform do-it-yourself auto repairs is to save money, down time on the vehicle and learn something about the troubleshooting of car problems in the process. Using the above example again, let's say that your vehicle overheating problem was a poor connection to the temperature switch that operates to cooling fan motor, which I've seen many times. If you replaced the cooling fan motor and the thermostat, you have just spent about $300 in parts and a full day's work on things that did not need to be replaced. Your overheating problem could have been solved for free with no parts by repairing the loose connection.

Remember the best part of do-it-yourself auto repair is saving money and learning something about your vehicle at the same time. Do not defeat the purpose, in guessing at what needs to be replaced and wasting time and money on replacing un-needed parts.

Mark R Gittelman is an ASE Certified Master Mechanic. Mark can be your friend in the auto repair business. For more free info visit his Diy auto repair page. Or see mark's new squidoo page that answers auto repair questions



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Comments on this article:


» left by Lexan from New York (1 year 28 days ago.)
Reader Rating: 5 out of 5
That's why it really pays to keep an eye on your cars maintenance like what I always do with my Lexus auto parts like its brake dust shields and other accessories, it will save your money and life for that...=)

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Article added to SearchWarp.com on Tuesday, July 03, 2007
View other articles written by Mark Gittelman (5,253) Silver Level Author Hall of Fame Top 100 Verified Account Industry Expert
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