CAUTION — ELECTRICAL TROUBLESHOOTING TOOLS
GI-14prose procedureELECTRICAL TROUBLESHOOTING TOOLS
Test Light
The test light, as shown in the figure, uses a 12V bulb. The two lead wires should be connected to probes. The test light is used for simple voltage checks and for checking for short circuits.
CAUTION
When checking a control unit, never use a bulb over 3.4W.
Jumper Wire
The jumper wire is used for testing by shorting across switch terminals and ground connections.
CAUTION
Do not connect a jumper wire from the power source line to a body ground; this may cause burning or other damage to harnesses or electronic components.
Voltmeter
The DC voltmeter is used to measure circuit voltage. A voltmeter with a range of 15V or more is used by connecting the positive (+) probe (red lead wire) to the point where voltage is to be measured and the negative (−) probe (black lead wire) to a body ground.
Diagnosis Connector
Insert the probe into the service hole when connecting a jumper wire to the diagnosis connector.
CAUTION
Do not insert the jumper wire probe into the diagnosis connector terminal, which may damage the terminal.
Ohmmeter
The ohmmeter is used to measure the resistance between two points in a circuit, and to check for continuity and short circuits.
CAUTION
Do not attempt to connect the ohmmeter to any circuit to which voltage is applied; this may burn or otherwise damage the ohmmeter.