Initial Inspection and Diagnostic Overview

Checkout
- Visually inspect engine compartment to ensure all vacuum hoses and spark plug wires are properly and securely connected.

- Examine all wiring harnesses and connectors for damaged insulation, burned, overheated, damaged pins, loose or broken conditions.

- Be certain battery is fully charged.

- All accessories should be off during diagnosis.

Notes
- A spark plug with a broken side electrode is not sufficient to check for spark and may lead to incorrect results.

Correct Volt-Ohm Meter Application
- The A/C voltage readings in the Pinpoint Test steps are all based upon readings taken with a "standard" Volt/Ohm Meter (Rotunda 014-00407 or Fluke 20 or 70 series). Do not use a "true" RMS type meter such as the Fluke 8060a because the A/C voltage readings obtained may be significantly different, leading to incorrect answers to the questions asked in the Pinpoint Test steps.

Wiring Inspection And Testing
- When making measurements on a wiring harness, both a visual inspection and a continuity test should be performed. Inspect the connector pins for damage (corrosion, bent or spread pins, etc.) when directed to remove a connector.

Voltage Testing And References
- When making voltage checks, a GROUND reading means any value within a range of 0 to 1 volt. Also B+ readings mean any value that falls within a range of 10 to 14 volts.

- When making voltage checks and a reference to ground is made, use either the negative battery lead or cast iron on the engine. B+ means the positive battery cable at the battery.