Important Safety Information
Before getting started there are some important things you should consider to ensure your safety:
- When working with the electrical system always assume anything you touch could be potentially energized
- Disconnect the battery and check for voltage using your multimeter before you start any work
- Be aware of the position of your battery and its terminals - an accidental short between the positive and negative terminals could cause damage or injury (especially if you short it with a limb)
- When working in the engine bay with the motor running, watch out for potential pinch/crush points, stay clear of:
- belts & pulleys
- radiator fans
important: rotating equipment may start/stop without warning
- Stay clear of coolant hoses, the exhaust manifold, and any other potential sources of heat
- Configure the multimeter for dwell mode
- Connect the black lead to the negative terminal of the battery, or any other good ground. If you can't reach/access the battery you can use most bare metal surfaces or look for a wire that is bolted to the body/frame somewhere - this is likely a dedicated ground point.
- Connect the red lead to either the negative (-) terminal/lead of the ignition coil, or the contact breaker terminal.
Note: On older vehicles with positive grounds lead connections should be reversed
- Press the range button to select the number of cylinders