Your speedometer trip and odometer dont work where is the electronic speed sensor located on a 1990 accord ex manual transmission?
First I'll confirm that you are right to look for the electrinic speed sensor. My 90 Accord EX 5 speed had the same problem. The sensor is located on the top of the transmission on the pass side of the engine bay. It is almost directly below the thermostat. You will need to remove the large black plastic air tube from the intake so you can get to the sensor. I bought an aftermarket model on eBay for about $30 instead of paying the $100+ from the Honda dealer, it works fine. Good luck.