Chosen Solution
After I repaired my sister’s iphone 6 lighting port the audio from the headphone jack only comes through the right side and not the left. How do I repair this?
Settings >general > accessibility Scroll down to hearing. Make sure all settings are normal. Adjust the slider to make sure it is centered. If this is already centered then try new headphones, the ones your using may not be working properly. If the problem persists then unfortunately the lightning port you used is bad and will need to get another one.
