Diagnostic Strategies

These pinpoint tests are designed to determine the cause of a condition. It may not always be necessary to follow the test to its conclusion. Perform only the steps necessary to correct the condition. Then check the operation of the system to ensure the cause has been found.

It is sometimes necessary to remove various components of the vehicle to gain access to the component to be tested. Refer to the applicable section for the removal and installation of the components. After verifying that the condition has been corrected, ensure all components removed have been installed.





The following tests can be performed using a Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent.

Diagnostic test leads T88M-50-TL have been developed for system diagnosis. These test leads are used in conjunction with a meter so that wiring harness connectors can be probed without damaging them. Test leads are used because they are dimensionally correct in relation to the wiring harness terminals and will not damage them.