Inspection Instruments

For inspection, use the following instruments:

1. Test lights A test light consists of a 12V bulb and lead wires. It is used to check voltages or short circuits.
   Fig 1: Checking Voltages Or Short Circuits

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   CAUTION: Never use a test light for checking ECU-related circuits or ECUs.
2. Self-powered test light A self-powered test light consists of a bulb, battery and lead wires connected in series. It is used to check continuity or grounding.
   Fig 2: Identifying Self-Powered Test Light

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. Jumper wire A jumper wire is used to close an open circuit.
   CAUTION: Never use a jumper wire to connect a power supply directly to a load.
   Fig 3: Identifying Jumper Wire

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. Voltmeter A voltmeter is used to measure the circuit voltage. Normally, the positive (red lead) probe is applied to the point of voltage measurement and the negative (black lead) probe to the body ground. Use a digital voltmeter to check for voltage drop before or after a component.
   Fig 4: Measuring Circuit Voltage

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
5. Ohmmeter An ohmmeter is used to check continuity or measure resistance of a switch or coil. If the measuring range has been changed, the zero point must be adjusted before measurement.
   Fig 5: Measuring Resistance Of Switch Or Coil

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.