Trucks driver side blinkers work but passenger sides dont?

Hey, so I just bought a 2003 tacoma with 292,000 miles on it. Bought it to be a beater but still gonna take care of it. The only 2 big things wrong with the truck when I bought it was the rack and pinion was leaking and the front and rear passenger side blinkers don't work. The guy who owned it said he replaced the bed on the truck and that's when he noticed the problem. I just replaced the driver side rear taillight and that didn't change anything. Anyone have this problem before?

 

I would look under rear of truck make sure plug got good connection

 

I have attached the wiring diagram… you will see that the D/S taillight assembly runs a ground wire to the P/S taillight assembly and that is grounded at ground point IG, left side of the dash…