ok, I own a 1990 honda accord DX with only 147000 miles on it. just recently my "S" light starts blinking. according to my research this means an electrical problem, but I do not know where start. it always shifts from 1st into 3rd. never 2nd or 4th. my TCU has a red LED which blinks 7 times. I dont know what that means in error codes so if anyone know TCU codes please let me know :)
 
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