When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Are you certain? Check the socket for voltage, even if the bulbs look good they may not be... Had this issue when I was a new mechanic at age 16... i checked EVERYTHING, except for the stupid brake bulbs themselves!
check for voltage on the wiring harness itself. how do you know the bulb is good? best way is to rotate the left side bulb to the right and see if the problem either follows or stays on the same side.