Timing Lights

Timing Lights

Timing lights are a type of automotive tool used to check the synchronization of the ignition system. They are typically used to check the timing of the spark plugs in relation to the crankshaft, and can also be used to check the timing of the camshaft.

Timing lights work by emitting a beam of light that is reflected off of a timing mark on the crankshaft pulley or camshaft sprocket. The light is then seen through a scope, which allows the mechanic to see the exact position of the mark in relation to the pointer on the scope.

Timing lights are an essential tool for any automotive mechanic, as they can help to diagnose a variety of problems with the ignition system. They are also relatively inexpensive and easy to use, making them a valuable addition to any mechanic's toolbox.

Types of Timing Lights

There are two main types of timing lights:

• Strobe lights emit a brief pulse of light, which allows the mechanic to see the timing mark for a split second.
• Dwell meters measure the amount of time that the spark plug is open, which can also be used to check the timing of the ignition system.

Strobe lights are the most common type of timing light, and they are typically the best choice for most applications. Dwell meters are more specialized tools, and they are typically only used by experienced mechanics.

How to Use a Timing Light

Using a timing light is relatively simple. To use a strobe light, follow these steps:

1. Connect the timing light to the battery.
2. Connect the trigger wire to the spark plug wire.
3. Start the engine and let it idle.
4. Aim the light at the timing mark on the crankshaft pulley or camshaft sprocket.
5. Adjust the timing until the mark lines up with the pointer on the scope.

Using a dwell meter is slightly more complicated. To use a dwell meter, follow these steps:

1. Connect the dwell meter to the battery.
2. Connect the spark plug wire to the meter.
3. Start the engine and let it idle.
4. Read the dwell time on the meter.

The correct dwell time will vary depending on the engine, so it is important to consult the manufacturer's specifications.

Conclusion

Timing lights are an essential tool for any automotive mechanic. They are relatively inexpensive and easy to use, and they can help to diagnose a variety of problems with the ignition system.

Types of Timing Lights

• Strobe lights
• Dwell meters