Diagnosing a Faulty Wing Mirror Indicator – Step by Step!

Stephen’s Diagnostic Process – Finding the Cause of the Issue

At 1Stop Motor Shop, our expert mechanic Stephen is working through the diagnostic process to identify why this wing mirror indicator isn’t working. Electrical faults like this can be caused by several issues, from bulb failures to wiring problems.

Watch the full video of Stephen diagnosing this faulty BMW Wing Mirror Indicator on YouTube! 

Common Reasons a Wing Mirror Indicator Stops Working

When a wing mirror indicator fails, the cause could be:

• Blown bulb or faulty LED module – The most common reason for failure.
• Wiring issues – Broken or loose wires can stop power from reaching the indicator.
• Corroded connectors – Moisture exposure can cause poor electrical contact.
• Control module faults – Some modern indicators are linked to vehicle electronics.

Why You Shouldn’t Ignore a Faulty Indicator

• Reduced road safety – Other drivers may not see your turn signals.
• MOT failure risk – Indicators are a legal requirement for a pass.
• Electrical faults may worsen – Wiring issues can spread if left unchecked.

Need an Electrical Repair? Book a Check at 1Stop Motor Shop Belfast!

If your indicators, lights, or electrics aren’t working, let our expert car mechanics in Belfast diagnose and fix the issue. Book a FREE vehicle health check today!

Book your check today! DM us on socials or call/WhatsApp: 07951 728365