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All Info About Auto Repair: Incident Simulation Testing Part 2
All Info About Auto Repairs
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Incident Simulation Testing Part 2

If the symptom is not present when the vehicle is being checked, everything you check will show as good.
» Part 1: Simulation Testing
» Part 2: Vehicle Vibration
» Part 3: Vehicle Vibration
» Part 4: Heat Sensitive
» Part 5: Water Intrusion
» Part 6: Other Problems

Vehicle Vibration

If the problem occurs or becomes worse while driving on a rough road or during periods when the engine is vibrating (idle with A/C on), you will want to check for a vibration related condition.

Connectors & Harness
Determine which connectors and wiring harness would affect the electrical system you are inspecting. Gently shake each connector and harness while monitoring the system for the incident you are trying to duplicate. This test may indicate a loose or poor electrical connection. Refer to the illustration below.

HINT: Connectors can be exposed to moisture. It is possible to get a thin film of corrosion on the connector terminals. A visual inspection may not reveal this without disconnecting the connector. On intermittent incidents it is a good idea to disconnect, inspect and clean the terminals on related connectors in the system.

Gently apply a slight vibration to sensors and relays in the system your inspecting. This test may indicate a loose or poorly mounted sensor or relay.

» Part 1       » Part 2       » Part 3       » Part 4
Part 5       » Part 6
Additional Information provided courtesy of
ALLDATAdiy.com and Warranty Direct
© 2000-2007 Vincent T. Ciulla

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