See Figures 1 and 2
One Data Link Connector (DLC) is located on the left-hand side of the engine compartment, and a second DLC is located at the lower center of the instrument panel.
The DLC is rectangular in design and capable of allowing access to numerous terminals. The connector has keying features that allow easy connection. The test equipment and the DLC have a latching feature to ensure a good mated connection.
The most commonly required electrical diagnostic tool is the Digital Multimeter, allowing voltage, ohmmage (resistance) and amperage to be read by one instrument. Many of the diagnostic charts require the use of a volt or ohmmeter during diagnosis.
The multimeter must be a high impedance unit, with 10 megohms of impedance in the voltmeter. This type of meter will not place an additional load on the circuit it is testing; this is extremely important in low voltage circuits. The multimeter must be of high quality in all respects. It should be handled carefully and protected from impact or damage. Replace the batteries frequently in the unit.