A–6 INTRODUCTION–HOW TO PERFORM FOR SYSTEM INSPECTION Ohmmeter Diode Ohmmeter Diode Digital Type Analog Type Ohmmeter k Ω Bulb If the circuit has diodes, reverse the two leads and check again. When touching the negative (–) lead to the diode positive (+) side and the positive (+) lead to the negative (–) side, there should be continuity. When touching the two leads in reverse, there should be no continuity. HINT: Specifications may vary depending on the type of tester, so refer to the tester's instruction manual before performing the inspection. Check LED (Light Emitting Diode) in the same manner as that for diodes. HINT: • Use a tester with a power source of 3V or greater to overcome the circuit resistance. • If a suitable tester is not available, apply battery voltage and check that the LED lights up. A (c) Use a volt/ohmmeter with high impedance (10kΩ/V minimum) for troubleshooting of the electrical circuit. 3. Bulb Check (a) Remove the bulb. (b) There should be continuity between the respective terminals of the bulb together with a certain amount of resistance. (c) Apply the two leads of the ohmmeter to each of the terminals. (d) Apply battery voltage and check that the bulb light up. Wire Harness Repair Manual (RM1022E) 7