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Flickering Dashboard Lights - Toyota Fortuner 2017

The dashboard lights in my 2010 Prado are flickering, especially when I use the turn signal. The headlights also dim slightly at idle. Battery is new. Any ideas?

electrical

qatmech Question Author

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3 answers

Answers & Replies 3

ISSUE SOLVED: It was a loose and glazed alternator belt! Tightened it up and the flickering is gone. Thanks, guys! Simple fix.

qatmech

Answered Nov 18, 2025 at 7:25 AM

Classic symptom of a failing alternator. The voltage regulator is probably on its way out, causing inconsistent voltage. Get your alternator's output tested at any parts shop. Should be a steady 13.5-14.5V.

johncarguy

Answered Nov 18, 2025 at 7:23 AM

@qatmech, before you replace the alternator, check the alternator belt tension and also clean the battery terminals and the main ground connection. A poor ground can cause the exact same flickering. It's a free, 5-minute check!

wqshaider

Replied Nov 18, 2025 at 7:24 AM

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