An example of this is a key wiring harness chewed through by a rat. Small rodents seem to love the taste of wiring. They also find the warm engine compartment a nice place to build a home. These visitors can do a lot of damage in a short period of time. Performing a quick visual inspection may reveal signs of one of these engine compartment pets.
Sticks, leaves and branches along with other debris that you would not usually see in an engine compartment such as pieces of bread or trash is a tell tale sign that a rodent has visited. In some cases you may also see tiny pieces of plastic from wiring conduit or colored pieces of insulation mixed into this debris.
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Car diagnostics mind set
Car diagnostics boils down to problem solving. Begin with a detailed evaluation of the issue and think about things that might be in common. An example would be an overheating engine coupled with no heat inside the car. In this case the thermostat controls the engine cooling system but on some models also allows hot coolant to flow to the heater core.
Car repair diagnosis should be performed in an orderly manner and should not depend on guesswork, taking chances or even educated guessing. This next link takes you back to the homepage for online auto repair. There you can find out what kind of automotive help is available for driveway mechanics. You can also find more articles about automobile diagnostics on the blog about car repair.