When the light was working, was it dim? If you don't have 12 volts getting to the bulb then you have resistance somewhere in the circuit.
https://www.2carpros.com/articles/one-headlight-is-dim-or-dull
So when he checked the voltage, what was the actual reading getting to the bulb?
https://www.2carpros.com/articles/how-to-check-wiring
Below is the wiring diagram that will help with this.
It is unlikely to be the ground as the bulbs share a ground so you could be right that it is the wiring. So that means we can try and just run a new wire and see if that resolves the issue. Then you can make that new wire permanent.
Let me know if you have other questions and what you find with this. Thanks
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Sunday, May 16th, 2021 AT 7:31 AM