Repair and Diagnosis: Tools and Equipment

PREPARATION OF TOOLS AND MEASURING EQUIPMENT
All necessary tools and measuring equipment should be available before starting any work.





SPECIAL SERVICE TOOLS (SST'S)
Use special service tools when they are required. SST's can be found under"preparation"prior to any procedure requiring them.





Electrical troubleshooting tools (Test Light)
The test light, as shown in figure, uses a 12V bulb. The two lead wires should be connected to probes.

The test light is used for simple voltage checks and in checking for short circuits.

CAUTION:
When checking the engine control module (ECM), never use a bulb exceeding 3.4W.





Electrical troubleshooting tools(Jumper wire)
The jumper wire is used for testing by shorting across switch terminals ground connections.

CAUTION:
Do not connect a jumper wire from the power source line to a body ground. Such a connection may cause damage to harnesses or electronic components.





VOLTMETER
The DC voltmeter measures 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 be measured, and the negative (-) probe (black lead wire)to a body ground.





OHMMETER
The ohmmeter is used to measure the resistance between two points in circuit and also to check for continuity and the diagnosis of short circuits.

CAUTION:
Do not attempt to connect the ohmmeter to any circuit in which voltage is applied. Such a connection may damage the ohmmeter.