My tihird brake light on 2000 rx 300 has been working since I bought the truck brand new. About three months ago, I noticed on my dash board a light blinking intermitently everytime I applied my brakes. I checked every lightbulb at rear of my vehicle, it turned out that the only bad lightbulb was my third brakelight bulb.
I replaced the bad bulb with a new bulb purchased from Lexus dealership. The third brakelight refused to come back on when brakes applied, I took my truck to my mechanic who checked the relay located in door panel by the left passenger seat for correct voltage and flow, Everything checked out up to that point. Then he checked for volttage from the relay to the third brake light itself, Again, he recorded correct voltage and flow. But when he put a new light bulb in the unit, again, no light. Could someone advise me what else could be wrong with my third brake light?