Symptoms
- Trigger works and drill runs but the light stays off
- Light flickers instead of staying steady
- Light worked before but dimmed and then went out over time
- Light doesn't turn on even at the very start of the trigger pull
Likely causes
- CommonBattery too low to power the light circuitSome tools prioritize motor power and cut auxiliary functions like the light first as the battery weakens.
- PossibleLED bulb has burned outLEDs last a long time but aren't immune to failure, especially after years of use.
- PossibleLight activation requires a specific trigger position not being usedSome drills only light up with a very light trigger pull, before the motor engages.
- Less commonInternal wiring to the light has come looseVibration over years of use can loosen a small internal connector.
What to do
- Charge the battery fully and retest, since a partially charged battery is the most common cause.
- Try a very light, gentle pull on the trigger, since some models light up before the motor spins.
- Test with a different battery if you have one available.
- Look up whether your specific model has a separate light button, since some tools do.
- If the light never comes on with a full battery on any trigger position, the LED or its wiring has likely failed.
- Since the light is a convenience feature, the drill remains fully usable without it if repair isn't worth the cost.
When to call a pro
A failed work light usually isn't worth a repair shop visit on its own; consider it if the tool needs other service anyway.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.