Safety With Ignition Systems
Keep these 8 safety precautions in mind when working with ignition systems.
1. Always wear OSHA-approved safety glasses when
working on any ignition system.
2. When working on any ignition system when the
engine is running, always keep your hands away
from the spark plug wires. In addition, be careful
not to drop any tools into the fan or pulleys on the
front of the engine.
3. Never use your hands to pull high-tension wires
off the spark plugs when the engine is running.
Use the correct spark plug wire pliers to remove
a spark plug wire.
4. When replacing parts or doing other work on the
ignition system, always make sure the ignition
system is off. If it is left on, a spark may be
produced, causing gasoline fumes to ignite.
Back to Safety
5. Always use the correct tools when working on
electronic and computerized ignition systems.
6. When removing spark plug wires from any ignition
system, be careful of the hot exhaust manifolds or
the headers. Make sure the engine has cooled
down before removing wires and spark plugs.
7. If you are using a volt/ohmmeter to check
resistances on an ignition system, make sure the
circuit has been disconnected and the ignition
system is off.
8. When testing any ignition system, always follow
the manufacturer’s suggested diagnosis and