Toyota Repair: 99 Camry right rear blinker, competent technician, toyota dealer

Question
My right rear blinker won't work anymore. I've replaced bulbs, mechanic checked fuses, Toyota did diagnostic and said it's the integration relay, and will replace it for $600. Have read online that it could be after market bulbs that do not pick up the signal the same as a Toyota bulb. Is this correct? Do you think it's the integration relay? Should I just go ahead with this really expensive repair for the blinker? Is there any way for me to replace the integration relay myself to save on labor? Thanks for your help.

Answer
Donna,
Its most likely a broken wire from opening and closing trunk or the
actual connector that you plug the bulb into (connector can be replaced buy cutting and splicing), I've seen this on a number
of 97 to 2001 Camrys. After market bulbs are fine (somebody is on drugs or its a Toyota dealer trying to sell their bulbs).
You need to find a competent technician that understands electrical.

Tim