Pinpoint Test Instructions

Do not run (perform) any of the following pinpoint tests unless you are instructed to do so by the Quick Test. Each pinpoint test assumes that a fault has been detected in the system with direction to enter a specific repair routine. Doing any Pinpoint Test without direction from the Quick Test may produce incorrect results and replacement of satisfactory components.
When directed to a Pinpoint Test, look carefully at the schematic on the first page (or the very first pinpoint test chart for the referred condition) and read the STOP WARNING below the schematic. Any time a repair is made, the battery ground cable should be disconnected and the brake pedal must be depressed for approximately 5---10 seconds, then Quick Test steps 3.0 through 6.0 should be repeated to ensure that the repair was effective.
Correct test results for the Quick Test procedure are dependent on the proper operation of related non-electronic components/systems. It may be necessary to correct any defects in these areas before the system will pass the Quick Test procedure.
Do not replace any components unless the test result indicates that components should be replaced.
Do not measure voltage or resistance at the processor or connect any test lights to it, unless specified to do so by the pinpoint test charts. Isolate both ends of a circuit, and turn the ignition key to the off position, whenever checking for shorts or continuity, unless specified to do so.
Disconnect solenoids and switches from the harness before measuring for continuity, resistance, or energizing by way of a 12 volt power source.
When using the Pinpoint Test procedure, follow each step in order, starting from the first step in the appropriate test. Follow each step until the fault is located.
After completing system repairs, verify all components are properly connected and repeat the functional test.
An open circuit is defined as any resistance reading obtained greater than 5 ohms, unless otherwise specified. A short circuit is defined as any resistance reading obtained of less than 10,000 ohms to ground, unless otherwise specified.