How to Turn On or Troubleshoot Tern eBike Headlights

by Bike Shop Girl
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Is the headlight on your Tern electric bike not turning on? Here are my top 3 things I check on a Tern bike if the headlight isn’t turning on. These tips would cover the Tern Vektron, Tern HSD, and Tern GSD.

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Ed January 24, 2023 - 10:54 am

Thanks for posting this video. The first two items were are definitely something that many new Tern owners will benefit from as the fact there are two switches to control the light feels a bit unusual.

I’ve had some problems on our HSD with the last issue. The wires seem very firmly attached, but when they’re touched or wiggled, the light flickers and sometimes goes off. Wiggling the wires usually resolves the problem, but it’s really frustrating when we’re out at night and the light goes out after hitting a bump in the road.

Given that the connection to the prongs seems solid is it possible there is some look connection inside the lamp? Do you have any pictures of videos of the lamp disassembled?

(Sending our bike in to our dealer for this type of issue isn’t really feasible so any DIY tips would be greatly appreciated!)


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