I would like to explain you How to tell if a headlight bulb is blown in brief.

When headlight bulb is blown, you need to check auto fuses in advance.

If auto fuses aged, headlight bulb is blown.

Meanwhile, you also need to check if you buy wrong watts of headlight bulbs.

If 12v headlight bulb using in 24v, that headlight bulb is blown always.

At the last, you need to check quality of headlight bulb.

If headlight bulbs are bad quality, they are always blown.

Welcome all customers come to talk with us how to tell if a headlight bulb is blown at any time.